Illumination sentence example

illumination
  • Within the band, the illumination FIG.
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  • 2, B), since there is no difference in the illumination and other external conditions, --------
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  • We will now investigate the total illumination distributed over the area of the circle of radius r.
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  • If the slit is of 'constant width and we require the illumination at various points on the screen behind it, we must regard the arc of the curve as of constant length.
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  • The only effect of the ruling is to diminish the amplitude in the ratio a: a+d; and, except for the difference in illumination, the appearance of a line of light is the same as if the aperture were perfectly free.
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  • On either side of any one of them the illumination is distributed according to the same law as for the central image (m = o), vanishing, for example, when the retardation amounts to (mn t 1)X.
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  • as the point P is more and more deeply immersed in the shadow, the illumination continuously decreases, and that without limit.
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  • If the eye, provided if necessary with a perforated plate in order to reduce the aperture, be situated inside the shadow at a place where the illumination is still sensible, and be focused upon the diffracting edge, the light which it receives will appear to come from the neighbourhood of the edge, and will present the effect of a silver lining.
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  • In any case the proportion of the whole illumination to be found outside the circle of radius r is given by J02(z)+J12(z).
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  • Outside the cone of 54° there will be faint illumination; within it, no secondary rays will be transmitted to the eye.
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  • The stem, by pointing directly to the light source, secures the best illumination possible for all of its leaves, the latter being distributed symmetrically around it.
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  • There is everywhere a certain illumination due to it.
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  • The electric lamp a gives illumination of the webs in a dark field, nearly in the manner described for the Cape transit circle micrometer; the intensity of illumination is regulated by a carbon-resistance controlled by the screw b.
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  • For the dark rings Ji(z) =o; so that the fraction of illumination outside any dark ring is simply Jo 2 (z).
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  • In estimating theoretically the resolving power on a double star we have to consider the illumination of the field due to the superposition of the two independent images.
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  • The illumination is intermittent, and appears to be under the control of the insect's nervous system.
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  • The illumination at B due to P then becomes comparatively small, indeed for some forms of aperture evanescent.
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  • If r, or z, be infinite, Jo(z), J 1 (z) vanish, and the whole illumination is expressed by 71-R 2, in accordance with the general principle.
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  • Their absolute freedom from diffraction, the perfect control of the illumination and thickness of the lines, and the accuracy with which it will be possible to construct scales for zone observations will be important features of the new method.
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  • The yellowing and subsequent casting of leaves, for instance, is a very general symptom of disease in plants, and may be induced by drought, extremes of temperature, insufficient or excessive illumination, excess of water at the roots, the action of parasitic Fungi, insects, worms, &c., or of poisonous gases, and so forth; and extreme caution is necessary in.
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  • It may be due to insufficient illumination (Etiolation), as seen in geraniums kept in too shaded a situation, and is then accompanied by soft tissues, elongation of internodes, leaves usually reduced in size, &c. The laying of wheat is a particular case.
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  • For the illumination of large stations by night electric arc lamps are frequently employed, but some authorities favour high-pressure incandescent gas-lighting.
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  • Ancient philosophers, who had not the Scriptures, received direct illumination from God, and only thus can the brilliant results attained by them be accounted for.
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  • The expression (5) gives the illumination at due to that part of the complete image whose geometrical focus is at =o, the retardation for this component being R.
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  • Owing to the variable illumination of the selenium thus produced, the resistance of the latter, and therefore the intensity of the current sent through the line to the receiving station by the battery, will be altered accordingly.
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  • Such a plate has the power of a condensing lens, and gives an illumination out of all proportion to what could be obtained without it.
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  • They do not see that the role of the natural sciences in this matter is merely to serve as an instrument for the illumination of one side of it.
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  • Neoplatonism owes its form to Plato, but its underlying motive is the widespread feeling of self-despair and the longing for divine illumination characteristic of the age in which it appears.
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  • This is the main transpiring tissue, and is protected from direct illumination and consequent too great evaporation.
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  • The most constantly occurring changes that beset a plant are connected with illumination, temperature, moisture, and contact with foreign bodies.
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  • In like manner we may find the illumination in any other direction, and it is obvious that it vanishes when sin 0 is any multiple of A/a.
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  • We have ultimately G =o, H = (7rV)- 1, so that 1 2 = I / 12V 2, or the illumination is inversely as the square of the distance from the shadow of the edge.
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  • We will next suppose that the light is transmitted by a slit, and inquire what is the effect of varying the width of the slit upon the illumination at the projection of its centre.
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  • When light passes through a small circular or annular aperture, the illumination at any point along the axis depends upon the precise relation between the aperture and the distance from it at which the point is taken.
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  • The process of augmenting the resultant illumination at a particular point by stopping some of the secondary rays may be carried much further (Soret, Pogg.
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  • Thus, if x = R cos 4), C =,r2R2J1(pR) pR and the illumination at distance r from the focal point is 4T2 r 21rRr1 fX (2 fKr) a J The ascending series for J 1 (z), used by Sir G.
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  • Thus, rays suffering one internal reflection will all lie within a cone of about 42°; in this direction the illumination will be most intense; within the cone the illumination will be fainter, while, without it, no light will be transmitted to the eye.
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  • Herodotus describes the oil pits near Ardericca (near Babylon), and the pitch spring of Zacynthus (Zante), whilst Strabo, Dioscorides and Pliny mention the use of the oil of Agrigentum, in Sicily, for illumination, and Plutarch refers to the petroleum found near Ecbatana (Kerkuk).
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  • By means of this " light-relay " the intensity of the light acting at any moment upon the sensitized paper is made proportional to the illumination of the selenium in the transmitter.
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  • When the difference of phase amounts to A, we may expect the resultant illumination to be very much reduced.
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  • But this procedure (apart from the question of illumination) is open to the objection that it makes excessive demands upon accuracy.
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  • Candles and flashlights for illumination.
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  • Illumination.
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  • in greenhouses where plants requiring very different optimum temperatures and illumination are kept together.
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  • There were arrangements for the brilliant illumination of the choir and its relief, which was sometimes sculptured on both sides and reversible, while the podia were intentionally more obscure.
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  • The inhabitants of tropical America sometimes keep fireflies in small cages for purposes of illumination, or make use of the insects for personal adornment.
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  • All chlorophyll plants require light, but in very different degrees, as exemplified even in the United Kingdom by the shade-bearing beech and yew contrasted with the light-demanding larch and birch; and as with temperature so with light, every plant and even every organ has its optimum of illumination.
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  • After this so rapid was the progress of this new mode of illumination that in the course of a few years it was adopted by all the of gas principal towns in the United Kingdom for lighting streets as well as shops and public edifices.
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  • The dorsiventrality of the prothallus has been shown to depend mainly on the illumination, the filamentous form being retained in feeble light; a similar result is obtained when the prothalli are cultivated in water.
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  • Assent in religion as in everything else he could justify only on the ground of its harmony with reason; professed " illumination without search, and certainty without proof " was to him a sign of absence of the divine spirit in the professor.
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  • He asserts .also the fact that our human power of receiving divine illumination (i.e.
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  • They give very steady illumination on fluorescent screens.
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  • By the principle of energy the illumination over the entire focal plane must be equal to that over the diffracting area; and thus, in accordance with the suppositions by which (3) was obtained, its value when integrated from E= co to = -1-x, and from n = - oo to n = -1-oo should be equal to ab.
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  • Thus if A be selfluminous, the illumination is a maximum at B, where all the secondary waves agree in phase.
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  • At neighbouring points the A illumination is less, in conse quence of the discrepancies of phase which there enter.
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  • When the interval is very small the discrepancy, though mathematically existent, produces no practical effect, and the illumination at B due to P is as important as that due to A, the intensities of the two luminous sources being supposed equal.
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  • If R = 2A, I vanishes at E =o; but the whole illumination, represented by I df, is independent of the value of R.
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  • If a growing stem receives stronger illumination on one side than another, its apex slowly turns from the vertical in the direction of the light source, continuing its change of position until it is in a direct line with the incident rays.
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  • If the point under consideration be so far away from the geometrical shadow that a large number of the earlier zones are complete, then the illumination, determined sensibly by the first zone, is the same as if there were no obstruction at all.
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  • If on the other hand the number of zones be odd, the effects conspire; and the illumination (proportional to the square of the amplitude) is four times as great as if there were no obstruction at all.
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  • The illumination of the field is given by a lamp near the object glass, controlled by a switch near the micrometer.
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  • cellulose lacquer peel, examined under PPL illumination.
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  • A slight shift in the angle of illumination reveals that this critter has some wonderfully metallic green coloration.
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  • Radiometric corrections may be necessary due to variations in scene illumination and viewing geometry, atmospheric conditions, and sensor noise and response.
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  • The imperial crown symbolizes the transcendent illumination or light of the 8th degree, the one that embraces and governs everything else.
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  • eke out every bit of illumination by fitting translucent, instead of opaque, shades.
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  • D65 performance and dynamic range is adjusted by an illumination system with RGB-optimised f-numbers.
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  • The planets in question appeared in the telescope as star-like objects which could be compared with the stars with much greater accuracy than a planetary disk like that of Mars, the apparent form of which was changed by its varying phase, due to the different directions of the sun's illumination.
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  • From the general formula (2), if A be the area of aperture, 102 = A2 / x2 f (7) The formation of a sharp image of the radiant point requires that the illumination become insignificant when, n attain small values, and this insignificance can only arise as a consequence of discrepancies of phase among the secondary waves from various parts of the aperture.
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  • In the direction (suppose horizontal) for which n=o, /f=sin 0, the phases of the secondary waves range over a complete period when sin 0 =X/a, and, since all parts of the horizontal aperture are equally effective, there is in this direction a complete compensation and consequent absence of illumination.
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  • When sin 0 = 2A/a, the phases range one and a half periods, and there is revival of illumination.
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  • Expressions suitable for discussion when v is large were obtained 1 In experiment a line of light is sometimes substituted for a point in order to increase the illumination.
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  • But the illumination of the bow is so weakened by the repeated reflections, and the light of the sun is generally so bright, that these bows are rarely, if ever, observed except in artificial rainbows.
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  • This was first suggested by Thomas Young, who showed that the rays producing the bows consisted of two systems, which, although emerging in parallel directions, traversed different paths in the drop. Destructive interference between these superposed rays will therefore occur, and, instead of a continuous maximum illumination in the direction of minimum deviation, we should expect to find alternations of brightness and darkness.
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  • From the prominence of the lights the festival is also known as the "Festival of Lights" or "Illumination" (Talmud).
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  • The 10th century, by means of this illumination of one of the darkest regions of disease, may diminish human suffering enormously, and may make habitable rich and beautiful regions of the earth's surface now, so far as man's work is concerned, condemned to sterility.
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  • The discoveries of the separate paths of sensory and motor impulses in the spinal cord, and consequently of the laws of reflex action, by Charles Bell and Marshall Hall respectively, in their illumination of the phenomena of nervous function, may be compared with the discovery in the region of the vascular system of the circulation of the blood; for therein a key to large classes of normal and aberrant functions and a fertile principle of interpretation were obtained.
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  • Before his illumination he had been instructed by dreams, and enjoyed extraordinary visions, and heard mysterious conversations.
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  • All the space behind the mirror will become dark, and all the space in front of the mirror will acquire an exalted illumination.
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  • Whatever this increased illumination may be, it can be precisely imitated by removing the mirror and placing a second lighted candle at the place occupied by the optical image of the first candle in the mirror, that is, as far behind the plane as the first candle was in front.
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  • The Illumination in Germany and Deism in England were largely responsible for this, though.
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  • 4 The illumination of these scales is interesting as being the first application of electricity to the illumination of astronomical instruments.
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  • Thus the scales, the positionand declination-circles, the field of view, the heads of all the micrometer-microscopes, the focusing scale, &c., are read without the aid of a hand-lamp and with an amount of illumination that can be regulated at the observer's pleasure.
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  • He dwelt upon the illumination of the mind and soul by direct communion with the Creative Spirit; upon the spiritual and poetic monitions of external nature; and upon the benefit to man of a serene mood and a simple way of life.
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  • If we compare the problem with that of measuring the illumination due to a source of light, we see at once how different it is.
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  • Intermittent illumination, however, with frequency equal to that of the fork shows at once that the jet is really broken up into drops, one for each vibration, and that these move over in a steady procession.
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  • At the same time, the repression of idealism and sentiment during the period of " illumination " was amply revenged, and the barren age of reason gave place to Romanticism.
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  • When the decision was known the populace, who had been eagerly waiting from early morning till night to hear the result, accompanied the members with torches and censers to their lodgings, and there was a general illumination of the city.
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  • The men in question claimed to be Christians and to enjoy divine illumination as truly as anybody, and so other safeguards appeared necessary.
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  • JULIEN OFFRAY DE LAMETTRIE (1709-1751), French physician and philosopher, the earliest of the materialistic writers of the Illumination, was born at St Malo on the 25th of December 1709.
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  • Under artificial illumination many sapphires appear dark and inky, whilst in some cases the blue changes to a violet, so that the sapphire seems to be transformed to an amethyst.
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  • The streets are lighted with electricity and gas, the Ouvidor and some other narrow streets having a great number of gas-pipe arches across them for decorative illumination on festal occasions.
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  • In that case the image of the double line shows a diminution of intensity along the centre, just sufficient to give a clear impression that we are not dealing with a single line, and the intensity at the minimum is 0.81 of that at the point of maximum illumination.
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  • This is now used only for illumination by raising and lowering a fire-basket.
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  • Rolle then entered on the contemplative life, passing through the preliminary stages of purification and illumination, which lasted for nearly three years, and then entering the stage of sight, the full revelation of the divine vision.
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  • Sometimes a large part of the sky shows a diffuse illumination, which, though brighter in some parts than others, possesses no definite outlines.
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  • The estimate depends in the case of reading type on the general illumination.
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  • Sometimes a Holtz machine was employed, but even without it illumination resembling aurora was seen on several occasions, extending apparently to a considerable height.
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  • At the burning of Moscow, he declared afterwards, his own soul had found illumination, and he had realized once for all the divine revelation to him of his mission as the peacemaker of Europe.
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  • That which is best known and has been most frequently edited is the Hotµavfipl)s sive De potestate et sapientia divina (Hotµavfipljs being the Divine Intelligence, 7roeµ)v avfip&v),‘ which consists of fifteen chapters treating of such subjects as the nature of God, the origin of the world, the creation and fall of man, and the divine illumination which is the sole means of his deliverance.
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  • He professed to rest all upon Scripture, yet accepted from the Babylon of Rome a baptism neither scriptural nor primitive, nor fulfilling the chief conditions of admission into a visible brotherhood of saints, to wit, repentance, faith, spiritual illumination and free surrender of self to Christ.
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  • The city has gas and electric illumination, street and suburban railways, drainage and a public water supply drawn from a small tributary of the Beberibe about 7 m.
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  • In the early seventies he had devoted much attention to the arts of illumination and calligraphy.
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  • The eye end presents an refractor appearance too complicated to be figured here; it has a micrometer and its illumination for the position circle, a micrometer head, and a bright or dark field, clamps in right ascension and declination and quick and slow motion in the same, a finder, microscopes for reading the hour and declination circles, an illuminated dial showing sidereal time and driven by an electric current from the sidereal clock, and counter weights which can be removed when a spectroscope or other heavy appliance is added.
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  • Sometimes this insight is claimed as the result of the operation of some higher faculty or some supernatural revelation to the individual; in other instances the theosophical theory is not based upon any special illumination, but is simply put forward as the deepest speculative wisdom of its author.
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  • The amount of want of illumination in each portion of the penumbra is roughly indicated by the shading.
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  • there will be a gradual increase of brightness in the penumbra from total darkness at the edge next the geometrical shadow to full illumination at the outer edge.
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  • Hence the illumination of the screen by the light passing through the hole is precisely what would be cut off by a disk which fits the hole, and the complement of fig.
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  • These may be called the spinal eyes, and it is said that they are disposed in such a way as to receive illumination preferentially from the right side, although this fact has no relation with the side upon which Amphioxus may lie upon the sand.
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  • of the middle ages: the illustrative picture was the precursor of the medieval miniature (the technical term for a picture in an illuminated MS.); and the independent simple ornament was to expand into the brilliant initial letters and borders of illumination.
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  • It is this daring faith in divine illumination that brings the Zwickau teachers most nearly into touch with the Anabaptists.
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  • 7, 8), that on the occasion of St Paul's preaching at Alexandria in Troas " there were many lights in the upper chamber "; but this was at night, and the most that can be hazarded is that a specially large number were lighted as a festive illumination, as in modern Church festivals (Martigny, Dict.
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  • The readiest method of obtaining instantaneous illumination is the electric spark, but with this Magnus was not successful.
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  • Further, the jet may be very well observed directly, if the illumination is properly managed.
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  • The actual behaviour of the colliding drops becomes apparent under instantaneous illumination, e.g.
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  • These H structures are invisible, with ordinary illumination in living cells or unstained preparations, and can only be made clearly visible by special methods of preparation and staining first used by Loffler.
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  • In view of his probable accession to power, preparations were made in the city of London for a banquet and a general illumination to celebrate the event.
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  • But amid this somewhat fierce illumination he went forward steadily as a public lecturer.
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  • Idealism in him assumed the form of a vivid illumination of the real.
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  • Another sermon, published in 1734, on the Reality of Spiritual Light set forth what he regarded as the inner, moving principle of the revival, the doctrine of a " special " grace in the immediate and supernatural divine illumination of the soul.
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  • As a distinct movement Pietism had run its course before the middle of the 18th century; by its very individualism it had helped to prepare the way for another great movement, the Illumination (Aufklarung), which was now to lead the world into new paths.
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  • For no one can utter the name of the ineffable God, and this washing is called Illumination (Gr.
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  • In after ages baptism was regularly called illumination.
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  • His scientific work was chiefly concerned with galvanism and its medical applications, with the construction and illumination of lighthouses, and with experiments for preserving human life and material objects from destruction by fire.
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  • One is the existence of dark and bright regions, irregular in form, on its surface; the other is the complete illumination of the lunar disk when seen as a crescent, a faint light revealing the dark hemisphere.
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  • But the question still remains open whether these variations may not be due wholly to the different phases of illumination by the sunlight as the latter strikes the region from various directions.
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  • The whole process may be compared to the gradual illumination of a body naturally capable of receiving light.
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  • The intellect has in itself power to know ultimate truth and intelligence, and does not require a mystical illumination as Ghazal" taught.
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  • The intellect, therefore, is one and continuous in all individuals, who differ only in the degree which their illumination has attained.
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  • The mountainous configuration of the moon's surface was there first described, and the so-called "phosphorescence" of the dark portion of our satellite attributed to its true cause--namely, illumination by sunlight reflected from the earth.
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  • ZODIACAL LIGHT, a faint illumination of the sky, surrounding the sun and elongated in the direction of the ecliptic on each side of the sun.
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  • The only source of doubt as to the validity of the conclusion that this is really the zodiacal light arises from the possibility that, after the close of the ordinarily recognized twilight, there may be a faint illumination arising from the reflection of light by the very rare upper atmosphere, shown by the phenomena of meteors to extend some hundred miles or more above the earth's surface.
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  • Intimately connected with this band and with the zodiacal light is the Gegenschein, or counter-glow, a faint illumination of the sky in the region opposite the sun, which may generally be seen by a trained eye when all the conditions are favourable., Unfavourable conditions are moonlight, nearness to the Milky Way, and elevation of the light above the horizon (and therefore a depression of the sun below the horizon) of less than 20°, and the presence in the region of any bright planet.
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  • In this case also the illumination must fall to zero by the vignetting of the pencils coming from objects at the margin of the field of view.
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  • So long as the pupil of the observer alone undertakes the regulation of the rays there is no perceptible diminution of illumination in comparison with the naked eye vision.
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  • A very marked diminution in illumination occurs, however, when the exit pupil of the instrument is smaller than the pupil of the eye.
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  • For lenses of short focus the diameter of the pupil is too large, and diaphragms must be employed which strongly diminish the aperture of the pencils, and so reduce the errors, but with a falling off of illumination.
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  • Illumination of transparent objects is effected by the universal-jointed mirror.
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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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  • If the obliquity of illumination be so great that the principal maximum passes through the outermost edge of the objective, while a spectrum of 1st order passes the opposite edge, so that in the back focal plane the diffraction phenomenon shown in fig.
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  • The resolution in the case of oblique illumination is given by the formula 6=X/2A.
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  • For example, two to five rows of globules were produced, and photographed, between the bristles of mosquito wings by using oblique illumination.
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  • Supposing, however, there is oblique illumination, then formula (5) can always be applied to determine the magnifying power attainable with at least one objective.
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  • The large loss of light, which is caused in dark-field illumination by the cutting off of the direct cone of rays, must be compensated by employing exceptionally strong sources.
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  • By dark-field illumination it is even possible to make such small details of objects perceptible as are below the limits of the resolving power.
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  • The extremely small particles of dust (motes in a sunbeam) in the rays are made perceptible by the diffracted light, whilst by ordinary illumination they are invisible.
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  • This method of illumination has been used by H.
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  • The inconvenience of orthogonal illumination, which certainly gives better results, is avoided in the coaxial apparatus.
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  • Owing to the slight difference of illumination between the immersion liquid and the cover, the portion of light reflected on the cover is not noticeable.
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  • In dark field illumination care has to be taken that no direct rays reach the objective, and hence a good dark field illumination can be produced if the condenser system has a larger aperture than the objective.
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  • Apparatus for a good dark field illumination has received much attention, because in this way ultra-microscopical particles can be made visible.
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  • - Path of Rays for dark-ground illumination with fixed diaphragm in the objective.
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  • In the Red Sea regions frankincense is valued not only for its sweet odour when burnt, but as a masticatory; and blazing lumps of it are not infrequently used for illumination instead of oil lamps.
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  • annunciator illumination.
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  • Under the microscope, dark-ground illumination reveals the details of one of the darker anthers and its filament.
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  • Excitation is via one or more laser sources, or via mercury arc illumination.
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  • Using two lamps, two color wheels and dual illumination channeling, the F3 achieves up to 5500 ANSI lumens brightness on screen.
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  • For instance, if you are calculating the scene illumination for a larger f-number you will expect a higher value.
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  • gifted with the faculty to perceive beauty, harmony and illumination.
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  • Plus, the new lower dual bulb headlight offers excellent pathway illumination.
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  • illumination of the spirit.
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  • The corded version is designed for LX200 and other telescopes that have a power output socket and handset controls for adjusting the reticle illumination.
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  • illumination varied with circumstances, but all were of a very crude character.
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  • In low light, the inbuilt photo light provides illumination to capture video or still images.
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  • Also a look at some rather bizarre 19th century microscopes which took the use of oblique illumination a bit too far!
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  • Figure (1) was obtained with brightfield illumination.
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  • It is very easy to make darkfield illumination yourself.
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  • Dark-field illumination is also one of the most rewarding techniques.
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  • The unit consists of a heated flat plate with central hole for transmitted illumination.
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  • Under the microscope, using dark-ground illumination, a single pollen covered filament can be seen to have spiked ridges.
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  • illumination gradient.
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  • illumination intensity of the area being observed.
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  • illumination angle.
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  • illumination technique.
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  • You can quickly change LEDs say from white to green for phase contrast or color darkfield illumination.
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  • Normally, the flash exposure I would use with brightfield illumination would " freeze " the motion of the cilia.
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  • This particular device is manufactured with a flat-topped LED to provide excellent wide angle viewing for switchtop and annunciator illumination.
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  • The range includes: StopClock Professional: the standard version suitable for almost all enlargers which use tungsten or halogen illumination.
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  • If you would like to see a manuscript illumination of nuns in a wealthy convent, click here.
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  • The Holy Spirit and Illumination The death of John the Apostle brought to an end the period of biblical inspiration.
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  • intensity of illumination (see table ).
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  • lacquer peel, examined under PPL illumination.
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  • Stained cellulose lacquer peel, examined under PPL illumination.
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  • This particular device is manufactured with a flat-topped led to provide excellent wide angle viewing for switchtop and annunciator illumination.
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  • led illumination for microscopes.
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  • IR is an extremely effective illumination tool, and does not cause any light pollution at any wavelength.
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  • This is specially designed for viewing an entire 35mm slide or negative frame, this 8x loupe has a clear base for shadowless illumination.
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  • manufactured with a flat-topped led to provide excellent wide angle viewing for switchtop and annunciator illumination.
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  • manuscript illumination, iconography, esthetics, German and Italian art.
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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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  • modulation contrast either alone or in combination with other illumination mechanisms.
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  • oblique illumination a bit too far!
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  • The portion BC is the light emitted after illumination and is called phosphorescence.
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  • plumed helmet, symbol of illumination.
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  • remember to switch off the illumination to the ' scope!
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  • The laser-etched reticle is evenly illuminated by a red LED, with illumination variable from bright to faint.
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  • searchlight beam can be adjusted to provide illumination over a wide area.
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  • swinging from chandeliers (indeed any forms of illumination) or bringing turtles.
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  • Our broadband UVB meters measure something different: the total UVB meters measure something different: the total UVB output in microwatts per square centimeter - the actual intensity of UVB illumination.
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  • viewing for switchtop and annunciator illumination.
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  • p. io) claim that became universal; the methods of illumination were improved; and micrometers with screws of previously unheard of fineness and accuracy were produced.
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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 divisions of both drums are conveniently read, simultaneously, by the lens e; at night the lamp which illuminates the webs and the position-circle also illuminates the drum-heads (see on illumination p. 385).
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  • Forty times, it is said, he read through the Metaphysics of Aristotle, till the words were imprinted on his memory; but their meaning was hopelessly obscure, until one day they found illumination from the little commentary by Farabi, which he bought at a bookstall for the small sum of three dirhems. So great was his joy at the discovery, thus made by help of a work from which he had expected only mystery, that he hastened to return thanks to God, and bestowed an alms upon the poor.
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  • Consequently he censures the opinion of those who in the illustration of the Scriptures refer everything to the illumination of the Holy Spirit, as well as that of others who, disregarding all knowledge of the languages, would explain words by things.
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  • An illumination of variable intensity (according to the deeper or lighter shades of the portion of the picture on which the light falls) thus takes place on the selenium cell.
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  • Cases of pallor due to too intense illumination and destruction of chlorophyll must also be distinguished.
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  • The response to the action of light in diatropic leaves is, according to Haberlandt, due to the presence of epidermal cells which are shaped like a lens, or with lens-shaped thickenings of the cuticle, through which convergence of the light rays takes place and causes a differential illumination of the lining layer of protoplasm on the basal walls of the epidermal cells, by which the stimulus resulting in the orientation of the leaf is brought about.
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  • In Germany the parallel movement of " illumination " (H.
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  • He believed that in order to complete the arc of truth philosophy must be supplemented by what he called "non-philosophy," a kind of mystical illumination by which was obtained a belief in God that could not be reached by mere intellectual effort (see HOffding, Hist.
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  • The title of " apostle " was not limited to the immediate disciples of our Lord, but was given to missionaries or evangelists who went about founding new churches; the prophets spoke by revelation; the teachers were enabled by supernatural illumination to instruct others.
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  • According to the undulatory theory the light cannot be regarded strictly as travelling along a ray; but the existence of an unobstructed ray implies that the system of Fresnel's zones can be commenced, and, if a large number of these zones are fully developed and do not terminate abruptly, the illumination is unaffected by the neighbourhood of obstacles.
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  • The distribution of illumination in the image of a luminous line is shown by the curve ABC (fig.
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  • Since we have now to integrate for the whole illumination at a particular point 0 due to all the components which have their foci in its neighbourhood, we may conveniently regard 0 as origin.
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  • Thus, rays suffering one internal reflection will all lie within a cone of about 42°; in this direction the illumination will be most intense; within the cone the illumination will be fainter, while, without it, no light will be transmitted to the eye.
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  • Outside the cone of 54° there will be faint illumination; within it, no secondary rays will be transmitted to the eye.
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  • During his residence in Birmingham, Messrs Chance being makers of glass for use in lighthouse lamps, his attention was naturally turned to problems of lighthouse illumination, and he was able to devise improvements in both the catoptric and dioptric methods for concentrating and directing the beam.
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  • 550 See James Dredge, Electric Illumination, vol.
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  • That baptism is called the Seal (vdpa'yls), and Illumination (4ceno-phs) in the 2nd century has been set down to the influence of the pagan mysteries; but as a matter of fact the former term is a metaphor from military discipline, and the idea conveyed in the latter that gnosis or imparting of divine love is an illumining of the soul is found both in the Old and New Testaments.
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  • The conceivable variations in the conditions which would count in algal life are variations in the chemical character of the water - whether fresh, brackish or salt; or in the rate of movement of the water, whether relatively quiet, or a stream or a surf; or in the degree of illumination with the depth and transparency of the water.
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  • And yet, while the miniature has a career of its own in artistic development which may be more conveniently dealt with under a separate heading (see Miniature), its decorative qualities are so closely bound up with those of the initial and border that an historical description of illumination must give full recognition to its prominent position in the general scheme of book-ornamentation of the middle ages.
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  • (See Cathars.) More than one sect of the 2nd century rejected water baptism on the ground that knowledge of the truth in itself makes us free, and that external material washing of a perishable body cannot contribute to the illumination of the inner man, complete without it.
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  • In the events which ended in the emancipation of the A erican colonies from the monarchy, Burke's political genius shonwith an effulgence that was worthy of the great affairs over w ich it shed so magnificent an illumination.
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  • In the 18th century " Illumination " - an age which piqued itself upon its " enlightenment, " and " Ilium!- which did a good deal to drive away obscurity, though at the cost of losing depth - Deism outside the churches is matched by a spirit of cool common-sense within them, a spirit which is not confined to professed Rationalists.
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  • Half-shade analysers depend upon the facility with which the eye can distinguish slight differences in the intensities of two streams seen in juxtaposition, when the illumination is not too bright.
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  • Intimately connected with this band and with the zodiacal light is the Gegenschein, or counter-glow, a faint illumination of the sky in the region opposite the sun, which may generally be seen by a trained eye when all the conditions are favourable., Unfavourable conditions are moonlight, nearness to the Milky Way, and elevation of the light above the horizon (and therefore a depression of the sun below the horizon) of less than 20°, and the presence in the region of any bright planet.
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  • These diaphragms are sometimes fitted in a slide, so that it is possible to move the diaphragm sideways and give oblique illumination (see below).
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  • The next step is to remember to switch off the illumination to the ' scope !
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  • From operating altitudes of up to 1000 feet, the searchlight beam can be adjusted to provide illumination over a wide area.
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  • There were few instances of people wearing beards, swinging from chandeliers (indeed any forms of illumination) or bringing turtles.
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  • The molds were equipped with internal illumination and textured to provide a real snow-like, sparkly finish.
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  • The luminous dial illumination for night navigation uses Tritium gas.
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  • Our broadband UVB meters measure something different: the total UVB output in microwatts per square centimeter - the actual intensity of UVB illumination.
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  • A desk lamp is usually meant to provide illumination for close activities like studying, reading and table hobbies.
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  • Besides display illumination levels, consider numbers.
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  • Turn the lights out: Use candles to provide soft illumination, or only let the reader hold a flashlight (bonus points for shining it upward on the face, casting ominous shadows all around the room).
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  • The design allowed the light to be swiveled to focus the illumination in a variety of directions, making the lamp extremely functional as a desk lamp.
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  • Place the light source close to the need - The fixtures were not designed to hold high power illumination.
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  • They can provide general overhead lighting for an entire room as well as specified illumination for designated areas.
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  • For example, in a space that needs a lot of light such as a kitchen, a U-shaped or square-shaped configuration can be installed to provide maximum illumination.
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  • Not only does it provide overhead illumination, the heads can be positioned so that they're aimed at a mirror, or other area where more light is desired.
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  • Consider the type of illumination you want in the room before deciding on what type of bulb you'll use.
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  • Optics offer Lens Peripheral Illumination Correction, which automatically compensates to prevent vignetting and lens shading, resulting in evenly balanced exposures.
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  • If you are in the market for a dog collar that provides illumination for your pet, what should you look for?
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  • The collars are capable of providing illumination for up to 200 hours.
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  • Designed for standard ceiling illumination, ceiling lights offer a variety of mounting options and unique style to create an easy solution to your lighting problem.
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  • Ceiling lights not only cast a wider expanse of illumination than floor lamps, but also complement the architectural features of a home and the interior design.
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  • The combination of many such lights on a rail provides ample illumination.
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  • A 10-foot by 10-foot room needs a light at least 17 inches in diameter with a minimum 150 watts of illumination.
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  • If your mirror reflects natural light from a window, the natural light offers a softer illumination by bringing a touch of the outdoors inside.
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  • Strategic light placement near or around a smaller mirror will eliminate shadows and offer natural illumination.
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  • There's a big difference between choosing a row of pendants to highlight a dining table and picking lights to increase the overall illumination in a room.
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  • Like monorail systems, cable track lighting is primarily used for accenting and task illumination.
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  • Do you need to create the illusion of more space in a room through the use of wall illumination?
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  • Progress Lighting has a number of illumination solutions, as well as a dealer locater so you can work with a lighting specialist close to home.
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  • Think about how much illumination you will need based upon the type of use your deck will get.
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  • Keep in mind that these lights are supposed to offer a subtle amount of illumination, not completely light the walkway or driveway.
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  • Generally, good room lighting provides overall illumination, task lighting, and accent lighting.
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  • Before you make a decision, take a look at a few standard and low voltage track lighting systems at your retailer to get an idea of how the illumination will work in your space.
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  • It isn't the best choice for overall illumination, but can add good accent and task lighting with flexibility and style.
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  • Make sure you have ample illumination, particularly if there is limited window space.
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  • These wired fixtures have seeded glass to help create gentle illumination for a safer and more stylish garden.
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  • This way, rearranging of the room's layout doesn't mean sacrificing illumination.
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  • Track lighting is an excellent accompaniment to general lighting, but is often too focused and specialized to provide the only illumination in a room.
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  • Halogen lights provide bright, white illumination that can cause eyestrain.
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  • Military night vision goggles are meant to take the place of artificial illumination and fire when nighttime combat or military applications are necessary.
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  • The goggles are fairly light at 0.8 kilograms and have infrared illumination (IRI).
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  • The advanced illumination sensor and built-in lights make it possible to take quality photos even when the light conditions are not ideal.
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  • If you've never seem a tea light lamp before, they're basically lamp-shaped candle holders, complete with shades, that use a tea light candle instead of a lightbulb for illumination.
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  • Window candles that plug in or run on batteries are a great extension of your outdoor holiday lights, offering additional outside illumination while bringing their warm glow indoors as well.
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  • Candle Impressions products use a small LED light for illumination, which is embedded inside the candle's shell.
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  • Flameless candles are also known as LED candles because they use a small LED light for illumination.
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  • The moon reflects the light from the sun and astrologically symbolizes an inner illumination of your deepest and most private thoughts.
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  • This flip flop boasts a ton of comfort as well as its own source of illumination.
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  • The flow is up, and if the energy is able to reach the brain, divine illumination will follow.
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  • Calligraphy Alphabets for Beginners: The Easy Way to Learn Lettering and Illumination Techniques by Mary Noble and Janet Mehigan is a great source for beginners.
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  • Discover Calligraphy and Illumination Kit: A Deluxe Art Set for Aspiring Artists includes a well-written instruction book by Cari Ferraro, as well as the supplies you need to get started.
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  • Vanity Fair Body Shine Illumination String Bikini (pictured): If you crave the sexy look of a string bikini but worry about a comfortable fit, your search is over.
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  • It can help to define a space, set the mood, and of course, provide the appropriate illumination for designated spaces.
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  • If flexibility and adaptable illumination is what you're looking for, a contemporary track lighting system may do the trick.
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  • Let in some light - Light colors and even illumination from an overhead fixture or nearby window gives your kitchen an instant facelift.
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  • Remember that there is a difference between daylight and nighttime illumination, so you will need to adjust the amount of makeup you wear accordingly.
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  • A hush is falling over the crowd and the stadium lights are collecting into beams of illumination on the field and a thick fog of tension is building.
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  • In some ways HTML (Hyper Text Markup Language) is the heir to the finer arts of calligraphy, illumination, typesetting, and later layout and typography.
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  • The name is appropriate as Luminox Watches use a unique technology for illumination.
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