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illuminating

illuminating Sentence Examples

  • "Scared?" he grinned, turning, the light beneath his chin illuminating his Halloween face.

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  • This oil was formerly used for illuminating purposes.

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  • Randolph, Domestic Life of Thomas Jefferson (New York, 1871); and an illuminating appreciation by W.

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  • One of the guards at the mouth of the cage strode in with a torch, illuminating the dead bodies surrounding her.

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  • It is, indeed, the very impartiality and objectivity of his attitude that make the writings of Gentz such illuminating documents for the period of history which they cover.

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  • The Appalachian field (Pennsylvania, New York, Ohio, West Virginia and Tennessee) produces oil rich in paraffin, practically free from sulphur and asphalt, and yielding the largest percentage of gasoline and illuminating oils.

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  • One of the guards at the mouth of the cage strode in with a torch, illuminating the dead bodies surrounding her.

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  • The older processes for the commercial preparation of this salt, which were based on the ignition of nitrogenous substances with an alkaline carbonate and carbon, have almost all been abandoned, since it is more profitable to prepare the salt from the byproducts obtained in the manufacture of illuminating gas.

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  • Witness his illuminating statement to Volney during the Consulate: "Why should France fear my ambition?

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  • Their monotheism remains Semitic - even in their conception of the cosmogonic and illuminating function of Wisdom they regard God as standing outside the world of physical nature and man, and do not grasp or accept the idea of the identity of the human and the divine; there is thus a sharp distinction between their general theistic position and that of Greek philosophy.

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  • Illuminating discussions of them can be found in Humboldt's Essay, Saco's Papeles and Pezuela's Diccionario.

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  • Early distinguished by her excellence as a pianist, organist and singer, she also showed considerable ability in painting and illuminating; but a lively poetic imagination led her to the path of literature, and more especially to poetry, folk-lore and ballads.

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  • To illuminating oil or kerosene a series of tests is applied in order that the colour, odour, specific gravity and flash-point or fire-test may be recorded.

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  • In his earlier years he devoted himself to chemistry, both theoretical and applied, publishing papers on the preparation of gold and platinum, numerical relations between the atomic weights of analogous elements, the formation of aventurine glass, the manufacture of illuminating gas from wood, the preservation of oil-paintings, &c. The reaction known by his name for the detection of bile acids was published in 1844.

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  • 3 was lost, but the illuminating power shows that it was intermediate in composition between Nos.

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  • In this account of the picnic we get an illuminating glimpse of Miss Sullivan's skill in teaching her pupil during play hours.

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  • For illuminating purposes, the most extensively-used product is kerosene, but both the more and the less volatile portions Of petroleum are employed in suitable lamps.

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  • Gas must be supplied at 16-candle illuminating power, and is officially tested by the chemists' department of the London County Council.

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  • BENZENE, C 6 H 6, a hydrocarbon discovered in 1825 by Faraday in the liquid produced in the compression of the illuminating gas obtained by distilling certain oils and fats.

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  • The higher olefines are found in the tar which is obtained by distilling bituminous shales, in illuminating gas, and among the products formed by distilling paraffin under pressure (T.

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  • Proceeding upon such lines as these, the Jews wove together their Midrashic homilies or sermons where, though we may find much that seems commonplace, there are illuminating parables and proverbs, metaphors and similes, the whole affording admirable examples of the contemporary thought and culture, both of the writers and - what is often overlooked - the level of their hearers or readers.

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  • Ammonium cyanide, NH 4 NC, a white solid found to some slight extent in illuminating gas, is easily soluble in water and alcohol, and is very poisonous.

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  • The existence of outflows or springs of gas in the region west of the Alleghanies had long been known, and much gas was used for illuminating purposes in Fredonia, New York, as early as 1821.

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  • The eye-end carries the micrometer with an illuminating apparatus similar to that described under Micrometer.

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  • In any case oil has ever been regarded as the aptest symbol and vehicle of the holy and illuminating spirit.

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  • The higher olefines are found in the tar which is obtained by distilling bituminous shales, in illuminating gas, and among the products formed by distilling paraffin under pressure (T.

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  • He was so often accused by political purists for associating politically with men of discredited reputation that his own picturesque statement of his conversion to a belief that in legislative or administrative politics one must work with all sorts and conditions of men is illuminating.

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  • Ramsay's Historical Commentary on Galatians (1899) contains archaeological and historical material which is often illuminating.

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  • The idea held up to about 1890 was that the illuminating value depended upon the amount of ethylene present.

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  • In 1876 M.P.E.Berthelot came to the conclusion that the illuminating value of the Paris coal gas was almost entirely due to benzene vapour.

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  • But here again another mistaken idea arose, owing to a faulty method of estimating the benzene, and there is no doubt that methane is one of the most important of the hydrocarbons present, when the gas is burnt in such a way as to evolve from it the proper illuminating power, whilst the benzene vapour, small as the quantity is, comes next in importance and the ethylene last.

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  • The vertical retort was one of the first forms experimented with by Murdoch, but owing to the difficulty of withdrawing the coke, the low illuminating power of the gas made in it, and the damage to the retort itself, due to the swelling of the charge during distillation, it was quickly abandoned.

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  • The cause of the failure of Murdoch's original vertical retort was undoubtedly that it was completely filled with coal during charging, with the result that the gas liberated from the lower portions of the retort had to pass through a deep bed of red-hot coke, which, by over-baking the gas, destroyed the illuminating hydrocarbons.

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  • The heating as well as the illuminating value of the gas per unit volume is lowered by over-baking, and Dr Bueb gives the following figures as to the heating value of gas obtained from the same coal but by different methods of carbonization: Vertical Retorts, 604 British thermal units per cub.

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  • It was for some time debated as to whether naphthalene added materially to the illuminating value of the gas, and whether an endeavour should be made to carry it to the point of combustion; but it is now acknowledged that it is a troublesome impurity, and that the sooner it is extracted the better.

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  • The solubility of naphthalene by various oils has led some engineers to put in naphthalene washers, in which gas is brought into contact with a heavy tar oil or certain fractions distilled from it, the latter being previously mixed with some volatile hydrocarbon to replace in the gas those illuminating vapours which the oil dissolves out; and by fractional distillation of the washing oil the naphthalene and volatile hydrocarbons are afterwards recovered.

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  • The fact that coal gas of an illuminating power of from 14 to 16 candles can be made from the ordinary gas coal at a fairly low rate, while every candle power added to the gas increases the cost in an enormous and rapidly growing ratio, has, from the earliest days of FIG.

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  • The gas obtained by the Young process, when tested by itself in the burners most suited for its combustion, gives on the photometer an illuminating value averaging from 50 to 60 candle-power, but it is claimed, and quite correctly, that the enriching power of the gas is considerably greater.

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  • This is accounted for by the fact that it is impossible to construct a burner which will do justice to a gas of such illuminating power.

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  • The fundamental objections to oil gas for the enrichment of coal gas are, first, that its manufacture is a slow process, requiring as much plant and space for retorting as coal gas; and, secondly, that although on a small scale it can be made to mix perfectly with coal gas and water gas, great difficulties are found in doing this on the large scale, because in spite of the fact that theoretically gases of such widely different specific gravities ought to form a perfect mixture by diffusion, layering of the gas is very apt to take place in the holder, and thus there is an increased liability to wide variations in the illuminating value of the gas sent out.

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  • The wonderful carburetting power of benzol vapour is well known, a large proportion of the total illuminating power of coal gas being due to the presence of a minute trace of its vapour carried E in suspension.

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  • it is used in various forms of carburettor, in which it is volatilized and its vapour used for enriching coal gas up to the requisite illuminating power.

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  • rendered luminous by passing it through chambers in which oils are decomposed by heat, the mixture being made so as to give an illuminating value of 22 to 25 candles.

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  • This, mixed with the poor coal gas, brings up its illuminating value to the required limit.

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  • Important factors in the use of carburetted water gas for enrichment are that it can be made with enormous rapidity and with a minimum of labour; and not only is the requisite increase in illuminating power secured, but the volume of the enriched gas is increased by the bulk of carburetted water gas added, which in ordinary English practice amounts to from 25 to 50%.

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  • ordinary gas, thereby enriching it, but as the supply became limited and the price prohibitive, other methods were from time to time advocated to replace its use in the enrichment of illuminating gas.

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  • The universal adoption of the incandescent mantle for lighting purposes has made it evident that the illuminating value of the gas is a secondary consideration, and the whole tendency now is to do away with enrichment and produce a gas of low-candle power but good heating power at a cheap rate for fuel purposes and incandescent lighting.

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  • Perhaps, however, the most illuminating example of the difference between traditions as recorded in J or E and traditions as given by P is found in the very first passage that occurs after the first long section of P describing the order of march of the several tribes and the position of the ark in the very centre of the host, both when encamped and on the march.

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  • From this illuminating passage it is clear (a) that by means of the Urim and Thummim the guilt or innocence of the suspected parties was determined; (b) that this was effected by a series of categorical questions implying the simple alternative of "yes" or "no," or something positive or negative.

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  • Where very short focus simple microscopes are employed, using high magnifications, it is imperative to employ a stand which permits exact focusing and the use of a special illuminating apparatus.

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  • Since, however, only relatively low powers are now employed, the ordinary rack and pinion movement for focusing suffices, and for the illuminating the object only a mirror below the stage is required when the object is transparent, and a condensing lens above the stage when opaque.

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  • With uniformly illuminated objects it may happen that the pencil in the object-space may be limited before passing the object, either through the size of the source of light employed or through a diaphragm connected with the illuminating system.

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  • If the illuminating pencil is parallel to the axis of the microscope objective, the illumination is said to be direct.

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  • (From Abbe, Theorie der Bilderzeugung Mikroskop.) of direct lighting, so that a banding of double the fineness can be perceived, by inclining the illuminating pencil to the axis; this is controlled by moving the diaphragm laterally.

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  • But, owing to the various partial reflections which the illuminating cone of rays undergoes when traversing the surfaces of the lenses, a portion of the light comes again into the preparation, and into the eye of the observer, thus veiling the image.

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  • Siedentopf employed two illuminating arrangements.

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  • With the .orthogonal arrangement for illuminating and observing the beam of light traverses an extremely fine slit through a well-corrected system, whose optic axis is perpendicular to the axis of the microscope; the system reduces the dimensions of the beam to about 2 to 4 in the focal plane of the objective.

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  • Illuminating Systems Most microscopic observations are made with transmitted light; an illuminating arrangement is therefore necessary, and as the plane of the object is nearly always horizontal or only slightly inclined, the illuminating rays must be directed along the optical axis of the microscope.

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  • To fully utilize the aperture of the system all dispersing rays in the object-space of the objective must be retained in the imagespace of the illuminating system.

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  • the field-diaphragm on the image-side of the observing system with object-side of the illuminating system, and the exit pupil of the illuminating system with the entrance pupil of the objective.

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  • If the aperture of the objective is increased, the diameter of the illuminating surface must also be increased so that the system is quite filled up, from which it follows that this method of illuminating soon fails.

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  • The possibilities of illuminating with a concave mirror seem a little more favourable.

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  • It =; L 1 = front lens is simpler to place an illuminating O of microscope; lens in front of the source of light so PP =diaphragm.

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  • that the source falls approximately at the front focus of this lens and consequently is represented at infinity through the illuminating lens.

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  • By a correct choice of the focal length of the illuminating lens in relation to the focal length of the mirror, it is possible to choose the size of the image of the source of light so that the whole object-field is uniformly lighted.

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  • - Abbe Illuminating Apparatus with Ordinary Condenser (Zeiss).

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  • The correct direction can be given to the illuminating cone by the mirror m.

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  • In this case the object lay upon a stage plate, whose centre had so far been made opaque, so that the rays coming from the illuminating plane mirror could not reach the objective direct, but only the rays passing the stage plate to the side of this blackened portion reached the Lieberkiihn mirror, and were used in lighting.

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  • It is best if the image of the light is not larger than the object examined, and to effect this, an illuminating lens with an iris diaphragm is often placed between the source of light and the illuminator.

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  • the iris diaphragm the size of the illuminating field can be controlled.

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  • A recent condenser of very high illuminating power is due to H.

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  • The object can be held firmly on the stage plate B by cramps C. On the lower side of the stage plate are the condenser and the diaphragms, and the illuminating mirror J is held by a rod D fixed to the stage plate.

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  • For examining preparations in polarized light a polarizer D is introduced n the illuminating apparatus below the diaphragm and an analyser E ai.

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  • This small plate can also be laid above the polarizer in the illuminating apparatus or in the eyepiece.

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  • The illuminating mirror is turned aside and a graduated scale is laid on the foot of the microscope.

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  • "Scared?" he grinned, turning, the light beneath his chin illuminating his Halloween face.

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  • A brief perusal of viewer comments online is illuminating.

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  • It produces 30 million candlepower and is capable of illuminating up to two-thirds of a football pitch.

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  • This outline of the Wisdom teaching consists of extracts from the original literature with an illuminating commentary.

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  • A tense and illuminating account of an extremely courageous stance taken against overwhelming odds.

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  • The parachute flares are fired into the air to produce a very bright light which slowly descends on a parachute illuminating a large area.

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  • ILLUMINATING THE ROUTE The minimum illuminance along the center line of a clearly defined escape route should be 1 Lux.

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  • illuminate simple obstruct most of the light in the cone, leaving just the edge of light cone still illuminating the specimen.

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  • It may be helpful to adjust the illuminating mirror and point the illumination system slightly higher or lower than center.

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  • The parachute flares are fired into the air to produce a very bright light which slowly descends on a parachute flares are fired into the air to produce a very bright light which slowly descends on a parachute illuminating a large area.

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  • A more illuminating image might be that of a band in 1986 producing a perfect psychedelic pastiche.

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  • The papers and the editorial commentary in this book together comprise the most illuminating and coherent rationale for the Kleinian technique yet published.

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  • The short tales are illuminating and encourage individual reflection without imposing judgment.

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  • From creating a scenography using light to transform an environment or by simply illuminating an object, the challenge is always an excitement.

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  • And the end of George V throws an illuminating sidelight on Palace politics.

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  • In adverse weather many ships seek shelter in the bay illuminating the night skyline.

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  • He offers some highly illuminating views, but the final upshot of his discussion is simply that it is good to be alive.

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  • The nozzles of small lamps are inserted in the tubes L, L, for illuminating the webs in a dark field; the light from these lamps is admitted through apertures in the strong hollow cylinder above mentioned (for illumination, see p. 385).

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  • The method of counting the total number of revolutions gives more friction and is less convenient than Repsolds', and no provision seems to be made for illuminating the micrometer head in the practical and convenient plan adopted by Repsolds.

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  • Repsolds also provide two insulated sliding contact rings instead of the single ring g, so that the electric current for illuminating the lamps does not pass through the instrument itself but may come to the micrometer from the storage battery through two insulated leads.

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  • of gas, with an illuminating power of 35 to 40 sperm candles, when gas only is extracted from the shale.

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  • A year later the Duma again came into collision with the government in a matter highly illuminating of the struggle between the ancient traditions and the new ideas in Russia.

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  • In The Idea of God as affected by Modern Knowledge (1885) Fiske discusses the theistic problem, and declares that the mind of man, as developed, becomes an illuminating indication of the mind of God, which as a great immanent cause includes and controls both physical and moral forces.

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  • Noteworthy additions were made to Cleveland architecture in the county court house and the city hall (of the uncompleted " Group " plan); in office buildings like the Engineers, the Illuminating, the Leader-News, and the Hanna buildings; in the " Plain Dealer " newspaper building; in the Cleveland Trust Co.'s bank building; in the Museum of Art; and in churches, the Church of the Covenant (Presbyterian), St.

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  • By far the most illuminating collection is that of Hugh Elliott, Letters of John Stuart Mill (2 vols., 1910), which contains letters to John Sterling, Carlyle, E.

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  • Witness his illuminating statement to Volney during the Consulate: "Why should France fear my ambition?

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  • The " cracking " process, whereby a considerable quantity of the oil which is intermediate between kerosene and lubricating oil is converted into hydrocarbons of lower specific gravity and boiling-point suitable for illuminating purposes, is one of great scientific and technical interest.

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  • To illuminating oil or kerosene a series of tests is applied in order that the colour, odour, specific gravity and flash-point or fire-test may be recorded.

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  • In civilized countries provision is made by law for the testing of the flash-point or fire-test of lamp-oil (illuminating oil or kerosene), the method of testing and the minimum limit of flash-point or fire-test being prescribed (see below, Legislation).

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  • For illuminating purposes, the most extensively-used product is kerosene, but both the more and the less volatile portions Of petroleum are employed in suitable lamps.

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  • Their monotheism remains Semitic - even in their conception of the cosmogonic and illuminating function of Wisdom they regard God as standing outside the world of physical nature and man, and do not grasp or accept the idea of the identity of the human and the divine; there is thus a sharp distinction between their general theistic position and that of Greek philosophy.

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  • Illuminating discussions of them can be found in Humboldt's Essay, Saco's Papeles and Pezuela's Diccionario.

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  • Gas must be supplied at 16-candle illuminating power, and is officially tested by the chemists' department of the London County Council.

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  • It is, indeed, the very impartiality and objectivity of his attitude that make the writings of Gentz such illuminating documents for the period of history which they cover.

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  • BENZENE, C 6 H 6, a hydrocarbon discovered in 1825 by Faraday in the liquid produced in the compression of the illuminating gas obtained by distilling certain oils and fats.

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  • When acetylene is burnt from a 000 union jet burner, at all ordinary pressures a smoky flame is obtained, but on the pressure being increased to 4 inches a magnificent flame results, free from smoke, and developing an illuminating value of 240 candles per 5 cubic feet of gas consumed.

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  • Besides the general works on modern Italy, see the Marquis Costa de Beauregard's interesting volumes La Jeunesse du roi Charles Albert (Paris, 1899) and Novare et Oporto (1890), based on the king's letters and the journal of Sylvain Costa, his faithful equerry, though the author's views are those of an old-fashioned Savoyard who dislikes the idea of Italian unity; Ernesto Masi's Il Segreto del Re Carlo Alberto (Bologna, 1891) is a very illuminating essay; Domenico Perrero, Gli Ultim2 Reali di Savoia (Turin, 1889); L.

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  • He was so often accused by political purists for associating politically with men of discredited reputation that his own picturesque statement of his conversion to a belief that in legislative or administrative politics one must work with all sorts and conditions of men is illuminating.

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  • Early distinguished by her excellence as a pianist, organist and singer, she also showed considerable ability in painting and illuminating; but a lively poetic imagination led her to the path of literature, and more especially to poetry, folk-lore and ballads.

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  • Gas carbon is produced by the destructive distillation of coal in the manufacture of illuminating gas (see GAS: Manufacture), being probably formed by the decomposition of gaseous hydrocarbons.

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  • Proceeding upon such lines as these, the Jews wove together their Midrashic homilies or sermons where, though we may find much that seems commonplace, there are illuminating parables and proverbs, metaphors and similes, the whole affording admirable examples of the contemporary thought and culture, both of the writers and - what is often overlooked - the level of their hearers or readers.

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  • - The most illuminating and fundamental work on Mexican archaeology is the Gesammelte Abhandlungen, of Eduard Seler (vol.

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  • Ammonium cyanide, NH 4 NC, a white solid found to some slight extent in illuminating gas, is easily soluble in water and alcohol, and is very poisonous.

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  • The older processes for the commercial preparation of this salt, which were based on the ignition of nitrogenous substances with an alkaline carbonate and carbon, have almost all been abandoned, since it is more profitable to prepare the salt from the byproducts obtained in the manufacture of illuminating gas.

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  • The Appalachian field (Pennsylvania, New York, Ohio, West Virginia and Tennessee) produces oil rich in paraffin, practically free from sulphur and asphalt, and yielding the largest percentage of gasoline and illuminating oils.

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  • The existence of outflows or springs of gas in the region west of the Alleghanies had long been known, and much gas was used for illuminating purposes in Fredonia, New York, as early as 1821.

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  • In his earlier years he devoted himself to chemistry, both theoretical and applied, publishing papers on the preparation of gold and platinum, numerical relations between the atomic weights of analogous elements, the formation of aventurine glass, the manufacture of illuminating gas from wood, the preservation of oil-paintings, &c. The reaction known by his name for the detection of bile acids was published in 1844.

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  • The reactionaries in power put off their promised reforms so persistently as to anger even Metternich; nor did the replacement of Bernetti by Lambruschini in 1836 mend matters; for the new cardinal secretary of state objected even to railways and illuminating gas, and was liberal chiefly in his employment of spies and of prisons.

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  • Yet it may generally be allowed that a strain of nobility, of which we occasionally catch illuminating glimpses, extorts from time to time an all-forgiving admiration.

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  • Till the last it was obliged to contend with the most formidable difficulties: yet it succeeded in effecting many notable reforms and in illuminating and crystallizing the distinctive doctrines of Catholicism.

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  • Extending from the south-west corner of the state through Greene, Washington, Allegheny, Beaver, Butler, Venango, Clarion, Forest, Elk, Warren, McKean and Tioga counties is the Pennsylvania section of the Appalachian oil-field which, with the small section in New York, furnished nearly all of the country's supply of petroleum for some years following the discovery of its value for illuminating purposes.

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  • But it was not until the middle of the 19th century that its value as an illuminating oil became known, and not until 1859 was the first petroleum well drilled.

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  • In 1869 Schwendener put forward the really illuminating view - exactly opposite to that of Baranetzkythat the gonidia in all cases were algae which had been attacked by parasitic fungi.

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  • The oil is obtained from the seeds by two principal methods - expression and decoction - the latter process being largely used in India, where the oil, on account of its cheapness and abundance is extensively employed for illuminating as well as for other domestic and medicinal purposes.

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  • Christentum (1907) is an illuminating monograph, giving a conspectus of the material.

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  • Randolph, Domestic Life of Thomas Jefferson (New York, 1871); and an illuminating appreciation by W.

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  • The eye-end carries the micrometer with an illuminating apparatus similar to that described under Micrometer.

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  • A process devised by him for the manufacture of illuminating gas from turpentine and resin was in use in New York for a time.

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  • The foreign commerce of the Philippines consists chiefly in the exportation of Manila hemp, dried coco-nut meat (copra), sugar and tobacco, both in the leaf and in cigars and cigarettes; and in the importation of cotton goods, rice, wheat-flour, fresh beef, boots and shoes, iron and steel, illuminating oil, liquors, paper and paper goods.

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  • With Lotze the ideal that at last the forms of thought shall be realized to be adequate to that which at any stage of actual knowledge always proves relatively intractable is an illuminating projection of faith.

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  • This was soon put into operation in Scotland, first with the Boghead coal or Torbanehill mineral, and later with bituminous shales, and though he had to face much litigation Young successfully employed it in the manufacture of naphtha and lubricating oils, and subsequently of illuminating oils and paraffin wax, until in 1866, after the patent had expired, he transferred his works to a limited company.

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  • In any case oil has ever been regarded as the aptest symbol and vehicle of the holy and illuminating spirit.

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  • Ramsay's Historical Commentary on Galatians (1899) contains archaeological and historical material which is often illuminating.

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  • Whatever may be the future history of his other views, he will always be remembered as an originator of a principle more illuminating than any which has appeared since the days of Newton, as one of its two discoverers whose scientific rivalry was only the beginning of a warm and unbroken friendship.

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  • Other manufactures valued in 1905 at more than $5,000,000 were: boots and shoes, cars and general railway shop work, illuminating and heating gas, lumber and planing mill products, phonographs, fertilizers, flour and grist mill products, iron and steel ships, refined lard and paper and wood pulp.

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  • This oil was formerly used for illuminating purposes.

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  • Trans., 1813 and 181 4) he deduced that the illuminating power of the former exceeded that of the latter in the proportion of 5: 2.

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  • And this I have experimented in a dark Room by illuminating those bodies with uncompounded light of divers colours.

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  • Illuminating Gas.-The first practical application of gas distilled from coal as an illuminating agent is generally as cribed to William Murdoch, who between the years of 1792 and 1802 demonstrated the possibility of making gas from coal and using it as a lighting agent on a large scale.

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  • It is clear from these facts that, prior to Murdoch's experiments, it was known that illuminating gas could be obtained by the destructive distillation of coal, but the experiments which he began at Redruth in 1792, and which culminated in the lighting of Messrs Boulton, Watt & Co.'s engine works at Soho, near Birmingham, in 1802, undoubtedly demonstrated the practical possibility of making the gas on a large scale, and burning it in such a way as to make coal-gas the most important of the artificial illuminants.

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  • An impression exists in Cornwall, where Murdoch's early experiments were made, that it was a millwright named Hornblower who first suggested the process of making gas to Murdoch, but, as has been shown, the fact that illuminating gas could be obtained from coal by distillation was known a century before Murdoch made his experiments, and the most that can be claimed for him is that he made the first successful application of it on a practical scale.

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  • In 1799 a Frenchman named Philippe Lebon took out a patent in Paris for making an illuminating gas from wood, and gave an exhibition of it in 1802, which excited a considerable amount of attention on the European continent.

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  • It was during the last four decades of the 19th century that the greatest advance was made, this period having been marked not only by many improvements in the manufacture of illuminating gas, but by a complete revolution in the methods of utilizing it for the production of light.

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  • In 1875 the London Argand, giving a duty of 3.2 candles illuminating power per cubic foot of ordinary 16 candle gas, was looked upon as the most perfect burner of the day, and little hope was entertained that any burner capable of universal adoption would surpass it in its power of developing light from the combustion of coal gas; but the close of the century found the incandescent mantle and the atmospheric burner yielding six times the light that was given by the Argand for the consumption of an equal volume of gas, and to-day, by supplying gas at an increased pressure, a light of ten times the power may be obtained.

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  • Since the advent of the incandescent mantle, the efficiency of which is dependent upon the heating power of the gas more than on its illuminating power, the manu facture of coal gas has undergone considerable modifications.

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  • The formation of the second class of bodies is a great loss to the gas manufacturer, as, with the exception of the trace of benzene carried with the gas as vapour, these products are not only useless in the gas, but one of them, naphthalene, is a serious trouble, because any trace carried forward by the gas condenses with sudden changes of temperature, and causes obstructions in the service pipes, whilst their presence in the tar means the loss of a very large proportion of the illuminating constituents of the gas.

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  • Moreover, these secondary products cannot be successfully reduced, by further heating, to simpler hydrocarbons of any high illuminating value, and such bodies as naphthalene and anthracene have so great a stability that, when once formed, they resist any efforts again to decompose them by heat, short of the temperature which breaks them up into methane, carbon and hydrogen.

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  • As the temperature is raised, the yield of gas from a given weight of coal increases; but with the increase of volume there is a marked decrease in the illuminating value of the gas evolved.

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  • Wright found, in a series of experiments, that, when four portions of the same coal were distilled at temperatures ranging from a dull red heat to the highest temperature attainable in an iron retort, he obtained the following results as to yield and illuminating power: - Composition of the Gas.

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  • 3 was lost, but the illuminating power shows that it was intermediate in composition between Nos.

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  • The idea held up to about 1890 was that the illuminating value depended upon the amount of ethylene present.

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  • In 1876 M.P.E.Berthelot came to the conclusion that the illuminating value of the Paris coal gas was almost entirely due to benzene vapour.

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  • But here again another mistaken idea arose, owing to a faulty method of estimating the benzene, and there is no doubt that methane is one of the most important of the hydrocarbons present, when the gas is burnt in such a way as to evolve from it the proper illuminating power, whilst the benzene vapour, small as the quantity is, comes next in importance and the ethylene last.

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  • The vertical retort was one of the first forms experimented with by Murdoch, but owing to the difficulty of withdrawing the coke, the low illuminating power of the gas made in it, and the damage to the retort itself, due to the swelling of the charge during distillation, it was quickly abandoned.

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  • The cause of the failure of Murdoch's original vertical retort was undoubtedly that it was completely filled with coal during charging, with the result that the gas liberated from the lower portions of the retort had to pass through a deep bed of red-hot coke, which, by over-baking the gas, destroyed the illuminating hydrocarbons.

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  • The heating as well as the illuminating value of the gas per unit volume is lowered by over-baking, and Dr Bueb gives the following figures as to the heating value of gas obtained from the same coal but by different methods of carbonization: Vertical Retorts, 604 British thermal units per cub.

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  • It was for some time debated as to whether naphthalene added materially to the illuminating value of the gas, and whether an endeavour should be made to carry it to the point of combustion; but it is now acknowledged that it is a troublesome impurity, and that the sooner it is extracted the better.

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  • The solubility of naphthalene by various oils has led some engineers to put in naphthalene washers, in which gas is brought into contact with a heavy tar oil or certain fractions distilled from it, the latter being previously mixed with some volatile hydrocarbon to replace in the gas those illuminating vapours which the oil dissolves out; and by fractional distillation of the washing oil the naphthalene and volatile hydrocarbons are afterwards recovered.

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  • The fact that coal gas of an illuminating power of from 14 to 16 candles can be made from the ordinary gas coal at a fairly low rate, while every candle power added to the gas increases the cost in an enormous and rapidly growing ratio, has, from the earliest days of FIG.

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  • The gas obtained by the Young process, when tested by itself in the burners most suited for its combustion, gives on the photometer an illuminating value averaging from 50 to 60 candle-power, but it is claimed, and quite correctly, that the enriching power of the gas is considerably greater.

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  • This is accounted for by the fact that it is impossible to construct a burner which will do justice to a gas of such illuminating power.

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  • The fundamental objections to oil gas for the enrichment of coal gas are, first, that its manufacture is a slow process, requiring as much plant and space for retorting as coal gas; and, secondly, that although on a small scale it can be made to mix perfectly with coal gas and water gas, great difficulties are found in doing this on the large scale, because in spite of the fact that theoretically gases of such widely different specific gravities ought to form a perfect mixture by diffusion, layering of the gas is very apt to take place in the holder, and thus there is an increased liability to wide variations in the illuminating value of the gas sent out.

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  • The wonderful carburetting power of benzol vapour is well known, a large proportion of the total illuminating power of coal gas being due to the presence of a minute trace of its vapour carried E in suspension.

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  • it is used in various forms of carburettor, in which it is volatilized and its vapour used for enriching coal gas up to the requisite illuminating power.

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  • rendered luminous by passing it through chambers in which oils are decomposed by heat, the mixture being made so as to give an illuminating value of 22 to 25 candles.

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  • This, mixed with the poor coal gas, brings up its illuminating value to the required limit.

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  • Important factors in the use of carburetted water gas for enrichment are that it can be made with enormous rapidity and with a minimum of labour; and not only is the requisite increase in illuminating power secured, but the volume of the enriched gas is increased by the bulk of carburetted water gas added, which in ordinary English practice amounts to from 25 to 50%.

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  • ordinary gas, thereby enriching it, but as the supply became limited and the price prohibitive, other methods were from time to time advocated to replace its use in the enrichment of illuminating gas.

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  • The universal adoption of the incandescent mantle for lighting purposes has made it evident that the illuminating value of the gas is a secondary consideration, and the whole tendency now is to do away with enrichment and produce a gas of low-candle power but good heating power at a cheap rate for fuel purposes and incandescent lighting.

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  • Perhaps, however, the most illuminating example of the difference between traditions as recorded in J or E and traditions as given by P is found in the very first passage that occurs after the first long section of P describing the order of march of the several tribes and the position of the ark in the very centre of the host, both when encamped and on the march.

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  • From this illuminating passage it is clear (a) that by means of the Urim and Thummim the guilt or innocence of the suspected parties was determined; (b) that this was effected by a series of categorical questions implying the simple alternative of "yes" or "no," or something positive or negative.

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  • Descartes (Dioptrique, 1637) describes microscopes wherein a concave mirror, with its concavity towards the object, is used, in conjunction with a lens, for illuminating the object, which is mounted on a point fixing it at the focus of the mirror.

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  • Where very short focus simple microscopes are employed, using high magnifications, it is imperative to employ a stand which permits exact focusing and the use of a special illuminating apparatus.

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  • Since, however, only relatively low powers are now employed, the ordinary rack and pinion movement for focusing suffices, and for the illuminating the object only a mirror below the stage is required when the object is transparent, and a condensing lens above the stage when opaque.

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  • With uniformly illuminated objects it may happen that the pencil in the object-space may be limited before passing the object, either through the size of the source of light employed or through a diaphragm connected with the illuminating system.

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  • If the illuminating pencil is parallel to the axis of the microscope objective, the illumination is said to be direct.

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  • in the case of a grating, telecentric transmission on the object-side, and in the front focal plane of the illuminating system a small circular aperture is arranged, then by the help of the auxiliary microscope one sees in the middle of the back focal plane the round white image 0 (fig.

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  • (From Abbe, Theorie der Bilderzeugung Mikroskop.) of direct lighting, so that a banding of double the fineness can be perceived, by inclining the illuminating pencil to the axis; this is controlled by moving the diaphragm laterally.

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  • But, owing to the various partial reflections which the illuminating cone of rays undergoes when traversing the surfaces of the lenses, a portion of the light comes again into the preparation, and into the eye of the observer, thus veiling the image.

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  • Siedentopf employed two illuminating arrangements.

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  • With the .orthogonal arrangement for illuminating and observing the beam of light traverses an extremely fine slit through a well-corrected system, whose optic axis is perpendicular to the axis of the microscope; the system reduces the dimensions of the beam to about 2 to 4 in the focal plane of the objective.

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  • Illuminating Systems Most microscopic observations are made with transmitted light; an illuminating arrangement is therefore necessary, and as the plane of the object is nearly always horizontal or only slightly inclined, the illuminating rays must be directed along the optical axis of the microscope.

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  • To fully utilize the aperture of the system all dispersing rays in the object-space of the objective must be retained in the imagespace of the illuminating system.

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  • the field-diaphragm on the image-side of the observing system with object-side of the illuminating system, and the exit pupil of the illuminating system with the entrance pupil of the objective.

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  • If the aperture of the objective is increased, the diameter of the illuminating surface must also be increased so that the system is quite filled up, from which it follows that this method of illuminating soon fails.

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  • The possibilities of illuminating with a concave mirror seem a little more favourable.

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  • It =; L 1 = front lens is simpler to place an illuminating O of microscope; lens in front of the source of light so PP =diaphragm.

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  • that the source falls approximately at the front focus of this lens and consequently is represented at infinity through the illuminating lens.

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  • By a correct choice of the focal length of the illuminating lens in relation to the focal length of the mirror, it is possible to choose the size of the image of the source of light so that the whole object-field is uniformly lighted.

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  • The apparatus must be such that the apertures of the illuminating rays can easily be altered, by inserting diaphragms in the course of the rays of the illuminating cone below the stage plate (fig.

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  • - Abbe Illuminating Apparatus with Ordinary Condenser (Zeiss).

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  • The correct direction can be given to the illuminating cone by the mirror m.

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  • In this case the object lay upon a stage plate, whose centre had so far been made opaque, so that the rays coming from the illuminating plane mirror could not reach the objective direct, but only the rays passing the stage plate to the side of this blackened portion reached the Lieberkiihn mirror, and were used in lighting.

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  • It is best if the image of the light is not larger than the object examined, and to effect this, an illuminating lens with an iris diaphragm is often placed between the source of light and the illuminator.

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  • the iris diaphragm the size of the illuminating field can be controlled.

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  • A recent condenser of very high illuminating power is due to H.

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  • The object can be held firmly on the stage plate B by cramps C. On the lower side of the stage plate are the condenser and the diaphragms, and the illuminating mirror J is held by a rod D fixed to the stage plate.

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  • For examining preparations in polarized light a polarizer D is introduced n the illuminating apparatus below the diaphragm and an analyser E ai.

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  • This small plate can also be laid above the polarizer in the illuminating apparatus or in the eyepiece.

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  • The illuminating mirror is turned aside and a graduated scale is laid on the foot of the microscope.

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  • Wenham, another constructor, did not at first succeed in avoiding the pseudoscopic effect, but, by the application of refracting dividing prisms, he subsequently arrived at orthoscopic representations and continued the development of the different methods for producing microphotographic stereograms; this was effected in the first case by placing a diaphragm over one half of the objective for each exposure, and in the second case by a suitable direction of the illuminating pencil (fig.

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  • The short tales are illuminating and encourage individual reflection without imposing judgment.

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  • From creating a scenography using light to transform an environment or by simply illuminating an object, the challenge is always an excitement.

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  • And the end of George V throws an illuminating sidelight on Palace politics.

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  • In adverse weather many ships seek shelter in the bay illuminating the night skyline.

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  • He offers some highly illuminating views, but the final upshot of his discussion is simply that it is good to be alive.

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  • However, dark eyed people who want to bring a brightening or illuminating effect to their natural eye color can use enhancer contacts such as FreshLook Radiance.

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  • The lamp may end up illuminating the end of a table, or the side, rather than sitting directly above the center.

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  • For something a little less expensive try Olay Definity Illuminating Eye Treatment or Regenerist Eye Lifting Serum.

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  • For something a little less expensive try Olay Definity Illuminating Eye Treatment or Regenerist Eye Lifting Serum.

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  • The Zoom! light is also capable of illuminating all teeth simultaneously which helps speed the bleaching process time.

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  • For something a little less expensive you could also try Olay Definity Illuminating Eye Treatment or Regener Lancome has great eye treatment line.

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  • Or if you need some coverage to even out your skin tone and hide blemishes, look towards tinted moisturizers or illuminating foundations.

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  • For those who absolutely cannot afford to skip the coverage of a foundation, Stila's Illuminating Foundation will give you a healthy glow while hiding minor imperfections.

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  • Illuminating Potion: Use this as a primer for foundation - its pigment-infused formula will leave skin luminous.

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  • Illuminating Cream Potion: Cooling and infused with light-reflecting particles, this thick cream is ideal for highlighting the brow bones and cheekbones.

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  • Accent lighting is a good choice for task lighting in the kitchen, over a desk, or anywhere that requires a little more light without illuminating the entire room.

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  • Most of these lights are used outdoors, found illuminating walkways and gardens.

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  • First of all there should be some light flowing through the walls of the tea pot illuminating the inside.

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  • Put several votive-sized cordless candles around the base of a large house plant, either real or artificial, inside the pot, for an illuminating glow.

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  • Love is a magic ray emitted from the burning core of the soul and illuminating the surrounding earth.

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  • You can add to the effect by running strands of clear indoor lights around the room and illuminating battery-operated candles.

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  • With a firm grip on Rowling's world, her illustrations carry a torch down the path the author has beaten out of the bush, illuminating the forest and casting a beam of light for readers to follow into each chapter.

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  • Descartes (Dioptrique, 1637) describes microscopes wherein a concave mirror, with its concavity towards the object, is used, in conjunction with a lens, for illuminating the object, which is mounted on a point fixing it at the focus of the mirror.

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  • It is clear from these facts that, prior to Murdoch's experiments, it was known that illuminating gas could be obtained by the destructive distillation of coal, but the experiments which he began at Redruth in 1792, and which culminated in the lighting of Messrs Boulton, Watt & Co.'s engine works at Soho, near Birmingham, in 1802, undoubtedly demonstrated the practical possibility of making the gas on a large scale, and burning it in such a way as to make coal-gas the most important of the artificial illuminants.

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  • An impression exists in Cornwall, where Murdoch's early experiments were made, that it was a millwright named Hornblower who first suggested the process of making gas to Murdoch, but, as has been shown, the fact that illuminating gas could be obtained from coal by distillation was known a century before Murdoch made his experiments, and the most that can be claimed for him is that he made the first successful application of it on a practical scale.

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  • In 1799 a Frenchman named Philippe Lebon took out a patent in Paris for making an illuminating gas from wood, and gave an exhibition of it in 1802, which excited a considerable amount of attention on the European continent.

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  • It was during the last four decades of the 19th century that the greatest advance was made, this period having been marked not only by many improvements in the manufacture of illuminating gas, but by a complete revolution in the methods of utilizing it for the production of light.

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  • Since the advent of the incandescent mantle, the efficiency of which is dependent upon the heating power of the gas more than on its illuminating power, the manu facture of coal gas has undergone considerable modifications.

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    2
  • The formation of the second class of bodies is a great loss to the gas manufacturer, as, with the exception of the trace of benzene carried with the gas as vapour, these products are not only useless in the gas, but one of them, naphthalene, is a serious trouble, because any trace carried forward by the gas condenses with sudden changes of temperature, and causes obstructions in the service pipes, whilst their presence in the tar means the loss of a very large proportion of the illuminating constituents of the gas.

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    2
  • Moreover, these secondary products cannot be successfully reduced, by further heating, to simpler hydrocarbons of any high illuminating value, and such bodies as naphthalene and anthracene have so great a stability that, when once formed, they resist any efforts again to decompose them by heat, short of the temperature which breaks them up into methane, carbon and hydrogen.

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    2
  • As the temperature is raised, the yield of gas from a given weight of coal increases; but with the increase of volume there is a marked decrease in the illuminating value of the gas evolved.

    0
    2
  • Wright found, in a series of experiments, that, when four portions of the same coal were distilled at temperatures ranging from a dull red heat to the highest temperature attainable in an iron retort, he obtained the following results as to yield and illuminating power: - Composition of the Gas.

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  • The method of counting the total number of revolutions gives more friction and is less convenient than Repsolds', and no provision seems to be made for illuminating the micrometer head in the practical and convenient plan adopted by Repsolds.

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  • A year later the Duma again came into collision with the government in a matter highly illuminating of the struggle between the ancient traditions and the new ideas in Russia.

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  • In The Idea of God as affected by Modern Knowledge (1885) Fiske discusses the theistic problem, and declares that the mind of man, as developed, becomes an illuminating indication of the mind of God, which as a great immanent cause includes and controls both physical and moral forces.

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  • By far the most illuminating collection is that of Hugh Elliott, Letters of John Stuart Mill (2 vols., 1910), which contains letters to John Sterling, Carlyle, E.

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  • The " cracking " process, whereby a considerable quantity of the oil which is intermediate between kerosene and lubricating oil is converted into hydrocarbons of lower specific gravity and boiling-point suitable for illuminating purposes, is one of great scientific and technical interest.

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  • When acetylene is burnt from a 000 union jet burner, at all ordinary pressures a smoky flame is obtained, but on the pressure being increased to 4 inches a magnificent flame results, free from smoke, and developing an illuminating value of 240 candles per 5 cubic feet of gas consumed.

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  • Besides the general works on modern Italy, see the Marquis Costa de Beauregard's interesting volumes La Jeunesse du roi Charles Albert (Paris, 1899) and Novare et Oporto (1890), based on the king's letters and the journal of Sylvain Costa, his faithful equerry, though the author's views are those of an old-fashioned Savoyard who dislikes the idea of Italian unity; Ernesto Masi's Il Segreto del Re Carlo Alberto (Bologna, 1891) is a very illuminating essay; Domenico Perrero, Gli Ultim2 Reali di Savoia (Turin, 1889); L.

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  • According to the U.S. Census of Manufactures (1905), "the coke industry in Everett is unique, inasmuch as illuminating gas is the primary product and coke really a by-product, while the coal used is brought from mines located in Nova Scotia."

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  • The reactionaries in power put off their promised reforms so persistently as to anger even Metternich; nor did the replacement of Bernetti by Lambruschini in 1836 mend matters; for the new cardinal secretary of state objected even to railways and illuminating gas, and was liberal chiefly in his employment of spies and of prisons.

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  • Yet it may generally be allowed that a strain of nobility, of which we occasionally catch illuminating glimpses, extorts from time to time an all-forgiving admiration.

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  • Till the last it was obliged to contend with the most formidable difficulties: yet it succeeded in effecting many notable reforms and in illuminating and crystallizing the distinctive doctrines of Catholicism.

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  • Extending from the south-west corner of the state through Greene, Washington, Allegheny, Beaver, Butler, Venango, Clarion, Forest, Elk, Warren, McKean and Tioga counties is the Pennsylvania section of the Appalachian oil-field which, with the small section in New York, furnished nearly all of the country's supply of petroleum for some years following the discovery of its value for illuminating purposes.

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  • But it was not until the middle of the 19th century that its value as an illuminating oil became known, and not until 1859 was the first petroleum well drilled.

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  • In 1869 Schwendener put forward the really illuminating view - exactly opposite to that of Baranetzkythat the gonidia in all cases were algae which had been attacked by parasitic fungi.

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  • The oil is obtained from the seeds by two principal methods - expression and decoction - the latter process being largely used in India, where the oil, on account of its cheapness and abundance is extensively employed for illuminating as well as for other domestic and medicinal purposes.

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  • Christentum (1907) is an illuminating monograph, giving a conspectus of the material.

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  • A process devised by him for the manufacture of illuminating gas from turpentine and resin was in use in New York for a time.

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  • The foreign commerce of the Philippines consists chiefly in the exportation of Manila hemp, dried coco-nut meat (copra), sugar and tobacco, both in the leaf and in cigars and cigarettes; and in the importation of cotton goods, rice, wheat-flour, fresh beef, boots and shoes, iron and steel, illuminating oil, liquors, paper and paper goods.

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  • With Lotze the ideal that at last the forms of thought shall be realized to be adequate to that which at any stage of actual knowledge always proves relatively intractable is an illuminating projection of faith.

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  • This was soon put into operation in Scotland, first with the Boghead coal or Torbanehill mineral, and later with bituminous shales, and though he had to face much litigation Young successfully employed it in the manufacture of naphtha and lubricating oils, and subsequently of illuminating oils and paraffin wax, until in 1866, after the patent had expired, he transferred his works to a limited company.

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  • Whatever may be the future history of his other views, he will always be remembered as an originator of a principle more illuminating than any which has appeared since the days of Newton, as one of its two discoverers whose scientific rivalry was only the beginning of a warm and unbroken friendship.

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  • Other manufactures valued in 1905 at more than $5,000,000 were: boots and shoes, cars and general railway shop work, illuminating and heating gas, lumber and planing mill products, phonographs, fertilizers, flour and grist mill products, iron and steel ships, refined lard and paper and wood pulp.

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  • Trans., 1813 and 181 4) he deduced that the illuminating power of the former exceeded that of the latter in the proportion of 5: 2.

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  • And this I have experimented in a dark Room by illuminating those bodies with uncompounded light of divers colours.

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  • Illuminating Gas.-The first practical application of gas distilled from coal as an illuminating agent is generally as cribed to William Murdoch, who between the years of 1792 and 1802 demonstrated the possibility of making gas from coal and using it as a lighting agent on a large scale.

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  • According to the U.S. Census of Manufactures (1905), "the coke industry in Everett is unique, inasmuch as illuminating gas is the primary product and coke really a by-product, while the coal used is brought from mines located in Nova Scotia."

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