Colouring Sentence Examples

The raw materials are selected with great care to assure chemical purity, but whereas in most glasses the only impurities to be dreaded are those that are either infusible or produce a colouring effect upon the glass, for optical purposes the admixture of other glass-forming bodies than those which are intended to be present must be avoided on account of their effect in modifying the optical constants of the glass.

The metal is chiefly used, as the oxide, for colouring glass and porcelain.

Rhodes was again famous for its pottery in medieval times; this was a lustre ware at first imitated from Persian, though it afterwards developed into an independent style of fine colouring and rich variety of design.

The colouring agents are generally metallic oxides.

Since in all domesticated cats retaining the colouring of the wild species the soles of the hind-feet correspond in this particular with the Egyptian rather than with the European wild cat, the presumption is in favour of their descent from the former rather than from the latter.

Other Indian cats with a tawny or fulvous type of colouring are probably the more or less modified descendants of the jungle-cat.

Not only is the whole atmosphere Christian in colouring, but we actually find the Greek gods in the guise of Enoch, Elijah, &c., while Philip is a Christian martyr, and Alexander himself a great apostle, even a saint; quotations from the Bible are frequent.

Bartolommeo learned from the younger artist the rules of perspective, in which he was so skilled, while Raphael owes to the frate the improvement in his colouring and handling of drapery, which was noticeable in the works he produced after their meeting.

The scenery of the islands is picturesque, gaining beauty from the fine colouring of the sea and the rich vegetation.

It is found in European streams, and is caught by anglers, being also a favourite in aquariums. The well-known and important industry of "Essence Orientale" and artificial pearls, carried on in France and Germany with the crystalline silvery colouring matter of the bleak, was introduced from China about the middle of the 17th century.

His colouring for the most part is unpleasing, partly owing to his violent treatment of skies with crude blues and orange, and his chiaroscuro usually is much exaggerated.

The bark, very dark externally, is an excellent tanning substance; the inner layers form the quercitron of commerce, used by dyers for communicating to fabrics various tints of yellow, and, with iron salts, yielding a series of brown and drab hues; the colouring property depends on a crystalline principle called quercitrin, of which it should contain about 8%.

An even more complete and minutely detailed view of the sacrificial system is no doubt obtained from the ceremonial manuals, the Kalpa-sutras; but it is just by the speculative discussions of the Brahmanasthe mystic significance and symbolical colouring with which they invest single rites - that we gain a real insight into the nature and gradual development of this truly stupendous system of ritual worship.

The scenery is everywhere strikingly beautiful and varied, and the coral beds of the more secluded bays in its harbours are conspicuous for their exquisite colouring.

As a whole, the birds of Papua are remarkable for their brilliance of plumage, or their metallic colouring.

He never changed, though he developed and perfected, the manner which he had adopted in Padua; his colouring, at first rather neutral and undecided, strengthened and matured.

The colouring of the steppe changes as if by magic, and only the silvery plumes of the steppe-grass (Stipa pennata) wave in the wind, tinting the steppe a bright yellow.

The general colouring, a faded brown, is somewhat dreary, but the mountain heights and promontories of the west display some grandeur of outline.

The mosaics of the 5th century, in the dome, are the earliest and perhaps the finest at Ravenna for their splendid decorative effect and rich colouring, and are less stiff and conventional than the later mosaics.

The mosaics of the choir (547) are due to Justinian, and, though inferior in style, are remarkable for their splendour of colouring and the gorgeous dresses of the persons represented, and also for their historical interest, especially the scenes representing the emperor and the empress Theodora presenting offerings.

Thus its non-liability to freeze (when not absolutely anhydrous, which it practically never is when freely exposed to the air) and its nonvolatility at ordinary temperatures, combined with its power of always keeping fluid and not drying up and hardening, render it valuable as a lubricating agent for clockwork, watches, &c., as a substitute for water in wet gas-meters, and as an ingredient in cataplasms, plasters, modelling clay, pasty colouring matters, dyeing materials, moist colours for artists, and numerous other analogous substances which are required to be kept in a permanently soft condition.

Its solvent power is also utilized in the production of various colouring fluids, where the colouring matter would not dissolve in water alone; thus aniline violet, the tinctorial constituents of madder, and various allied colouring matters dissolve in glycerin, forming liquids which remain coloured even when diluted with water, the colouring matters being either retained in suspension or dissolved by the glycerin present in the diluted fluid.

Moreover, both in drawing and in colouring there is frequently much that is untrue to nature, so that it has not uncommonly happened for them to fail in the chief object of all zoological plates, that of affording sure means of recognizing specimens on comparison.

Still the colouring is pretty well done, and experience has proved that generally speaking there is not much difficulty in recognizing the species represented.

Instead of the present boat, with its heavy black cabin and absence of colouring, the older forms had an awning of rich stuffs or gold embroideries, supported on a light arched framework open at both ends; this is the gondola still seen in Carpaccio's and Gentile Bellini's pictures (c. 150o).

New amalgams and methods of colouring have been discovered, and fresh forms have been diligently studied.

Now, however, the mottled soaps, blue and grey, are produced by working colouring matter, ultramarine for blue, and manganese dioxide for grey, into the soap in the frame, and mottling is very far from being a certificate of excellence of quality.

The soap is now milled in the form of ribbons with the perfume and colouring matter, and the resulting strips are welded into bars by forcing through a heated nozzle.

The author of these receipts is not under any delusion that he is transmuting metals; the MS. is merely a workshop manual in which are described processes in daily use for preparing metals for false jewellery, but it argues considerable knowledge of methods of making alloys and colouring metals.

Thus, in the treatise known as Physica et Mystica and falsely ascribed to Democritus (such false attributions are a constant feature of the literature of alchemy), various receipts are given for colouring and gilding metals, but the conception of transmutation does not occur.

Later, however, as in the Commentary on this work written by Synesius to Dioscorus, priest of Serapis at Alexandria, which probably dates from the end of the 4th century, a changed attitude becomes apparent; the more practical parts of the receipts are obscured or omitted, and the processes for preparing alloys and colouring metals, described in the older treatise, are by a mystical interpretation represented as resulting in real transmutation.

Of the aromatic compounds azo-benzene is bright orange-red, and a-azonaphthalene forms red needles or small steel-blue prisms. The azogroup, however, has little or no colouring effect when present in a ring system, such as in cinnolene, phthalazine and tolazone.

According to its sex, or the season of the year, it is known as the red, grey or brown linnet, and by the earlier English writers on birds, as well as in many localities at the present time, these names have been held to distinguish at least two species; but there is now no question among ornithologists on this point, though the conditions under which the bright crimson-red colouring of the breast and crown of the cock's spring and summer plumage is donned and doffed may still be open to discussion.

The coast scenery, especially on the west, is always picturesque and often grand, the cliffs, sheer precipices of brilliant colouring, reaching a height of over l000 ft.

Among the latter are species of curious habits and remarkable colouring.

Lepidoptera are very brilliant in colouring.

Its buildings depended for their effect principally on mass and gorgeous colouring.

His battle-pieces have movement and fire, warm colouring (now too often blackened), and great command of the brush, - those of moderate dimensions are the more esteemed.

An important nucleo-proteid is haemoglobulin or haemoglobin, the colouring matter of the red blood corpuscles of vertebrates; a related substance, haemocyanin, in which the iron of haemoglobin is replaced by copper, occurs in the blood of cephalopods and crayfish.

With such an enormous geographical range the species must of necessity present itself under a considerable number of local phases, differing from one another to a greater or less degree in the matters of size and colouring.

The "foxy red" colouring of the typical race of north-western Europe is too well known to require description.

The coral is generally reddish, but the colouring ranges from light yellow to chocolate-brown.

Maria Nuova at Gubbio (1404), extremely well preserved, with bright colouring and fine details.

The colouring of ordinary ethnographical maps is necessarily somewhat misleading.

This colouring power is due to the presence of polychlorite, a substance whose chemical formula appears to be C4 8 1-160018, and which may be obtained by treating saffron with ether, and afterwards exhausting with water.

This crocin is a red colouring matter, and it is surmised that the red colour of the stigmas is due to this reaction taking place in nature.

The general nature of the colouring ingredients employed, and the colour effects produced by them, have already been mentioned.

In coloured sheet-glass, two distinct kinds are to be recognized; in one kind the colouring matter is contained in the body of the glass itself, while in the other the coloured sheet consists of ordinary white glass covered upon one side with a thin coating of intensely coloured glass.

The latter kind is known as " flashed," and is universally employed in the case of colouring matters whose effect is so intense that in any usual thickness of glass they would cause almost entire opacity.

Oxides of iron and manganese can only be used in glass manufacture in comparatively small quantities for the purpose of colouring or neutralizing colour in glass, and their introduction would not be a matter of sufficient importance to be specially recorded.

Some of the last-named are represented with such truth of colouring and delicacy of detail that even the separate feathers of the wings and tail are well distinguished, although, as in an example in the British Museum, a human-headed hawk, the piece which contains the figure may not exceed 4 in.

When the vines are in flower, and when the fruit is colouring, the evaporating troughs should be kept dry, but the aridity must not be excessive, lest the red spider and other pests should attack the leaves.

The syrup in the cistern is allowed to remain for about twelve hours, by which time the char will have absorbed all the colouring matter in it, as well as the lime.

Munich is still the leading school of painting in Germany, but the romanticism of the earlier masters has been abandoned for drawing and colouring of a realistic character.

That Micah lived in the Shephelah or Judaean lowland near the Philistine country is clear from the local colouring of i.

It appears, therefore, that Spencer ultimately describes the Knowable in terms of the mechanical conceptions of matter and motion, and that this must give a materialistic colouring to his philosophy.

Of the general characters of acids we may here notice that they dissolve alkaline substances, certain metals, &c., neutralize alkalies and redden many blue and violet vegetable colouring matters.

It contains albuminous bodies in solution, and is in fact a pure solution of two or more poisonous proteids, which are the active agents, with a small quantity of an organic acid or colouring matter.

The colouring is that of classic mythology, but the spiritual element is as individual as that of any classical poem by Milton, Gray, Keats or Tennyson.

In his Commentaries, by laying aside the ornaments of oratory, he created the most admirable style of prose narrative, the style which presents interesting events in their sequence of time and dependence on the will of the actor, rapidly and vividly, with scarcely any colouring of personal or moral feeling, any oratorical passion, any pictorial illustration.

He avoids not only every unusual but every superfluous word; and, although no writing can be more free from rhetorical colouring, yet there may from time to time be detected a glow of sympathy, like the glow of generous passion in Thucydides, the more effective from the reserve with which it betrays itself whenever he is called on to record any act of personal heroism or of devotion to military duty.

In general the main elevations of the two ranges form pairs lying opposite one another; the forms of both ranges are monotonous, but the colouring is splendid, especially when viewed from a distance; when seen close at hand only a few valleys with perennial streams offer pictures of landscape beauty, their rich green contrasting pleasantly with the bare brown and yellow mountain sides.

The flowers are frequently large and showy, and are generally attractive from their high colouring.

The Persian fallowdeer (C. [D.] mesopotamicus), a native of the mountains of Luristan, is larger than the typical species, and has a brighter coat, differing in some details of colouring.

The blue colouring substance is ferrous sulphide, the upper reddish layer contains more ferric oxide, which the predominance of decomposing organic matter in the substance of the mud reduces to ferrous oxide and subsequently by further action to sulphide.

Sifakas are very variable in colouring, but always show a large amount of white.

This work led naturally to the synthesis of many terpenes and members of the camphor group; also to the investigation of various alkaloids and natural colouring matters.

These volumes revealed the author as the most gifted of the immediate disciples of Wordsworth, with a warmer colouring and more pronounced ecclesiastical sympathies than the master, and strong affinities to Tennyson, Keble and Monckton Milnes.

The result was a precipitate, aniline black, from which he obtained the colouring matter subsequently known as aniline blue or mauve.

Thus encouraged, he took out a patent for his process, and leaving the College of Chemistry, a boy of eighteen, he proceeded, with the aid of his father and brother, to erect works at Greenford Green, near Harrow, for the manufacture of the newly discovered colouring matter, and by the end of 1857 the works were in operation.

For instance, there are no bilinf or legendary poems, such as are found among the Russians, although many passages in the ancient chroniclers from their poetical colouring seem to be borrowed from old songs or legends, and the first verses of some of these compositions have been preserved.

There is a good deal of local colouring in the pieces of Fredro; although the style is French, the characters are taken from Polish life.

It also has the power of absorbing colouring matters from solution.

The fish fauna of the islands is especially noted for the gorgeous colouring of many of the species.

So far then, Midrash tends to include moralizing history, whether we call it narrative or romance, attached to names and events, and it is obviously exemplified whenever there are unmistakable signs of untrustworthy amplification and of some explicit religious or ethical aim colouring the narrative.

The analysis of manganese dioxide in 1774 led him to the discovery of chlorine and baryta; to the description of various salts of manganese itself, including the manganates and permanganates, and to the explanation of its action in colouring and decolourizing glass.

About the same time he showed by a wonderful series of experiments that the colouring matter of Prussian blue could not be produced without the presence Of a substance of the nature of an acid, to which the name of prussic acid was ultimately given; and he described the composition, properties and compounds of this body, and even ascertained its smell and taste, quite unaware of its poisonous character.

Thus Fichte, Spinoza, Jakob Boehme and the Mystics, and finally, the great Greek thinkers with their Neoplatonic, Gnostic, and Scholastic commentators, give respectively colouring to particular works.

In the former process it is obtained in the form of a dilute aqueous solution, in which also the colouring matters of the wine, salts, &c., are dissolved; and this impure acetic acid is what we ordinarily term vinegar.

Excepting on the west coasts of the larger islands, which present rugged cliff scenery remarkable both for beauty and for colouring, the group lies somewhat low and is of bleak aspect, owing to the absence of trees.

Platinum is employed in oxidizing processes, and in the fusion of substances with fluxes; also in observing the colouring effect of substances on the blowpipe flame (which effect is apt to be somewhat masked by charcoal).

Although the information which has been brought to bear upon Egyptian life and customs substantiates the general accuracy of the local colouring in some of the biblical narratives, the latter contain several inherent improbabilities, and whatever future research may yield, no definite trace of Egyptian influence has so far been found in Israelite institutions.

During the period he spent at Miilhausen, Schatzenberger paid special attention to industrial chemistry, particularly in connexion with colouring matters, but he also worked at general and biological chemistry which subsequently occupied the greater part of his time.

After ignition it becomes almost insoluble in acids, and on fusion with silicates it colours them green; consequently it is used as a pigment for colouring glass and china.

Silk fibre consists essentially of a centre or core of fibroin, with a covering of sericin or silk albumen, and a little waxy and colouring matter.

It may on the contrary be confidently asserted with regard to the first three Gospels that the local colouring in them is predominantly Palestinian, and that they 1 The character of Tatian's Diatessaron has been much disputed in the past, but there can no longer be any reasonable doubt on the subject after recent discoveries and investigations.

Corfu is generally considered the most beautiful of all the Greek isles, but the prevalence of the olive gives some monotony to its colouring.

He also studied the colouring matters of leaves and flowers, the composition of bone, cerebral matter and other animal substances, and the processes of fermentation, in regard to the nature of which he was an opponent of Pasteur's views.

From the flanks of Lebanon, especially from the heights which lie to the north of the Qasimiyeh or IKasimiya (Litany) River, the traveller looks down upon some of the finest landscape in the world; in general features the scenery is not unlike that of the Italian Riviera, but surpasses it in grandeur and a peculiar depth of colouring.

Nitric acid finds extensive application in the manufacture of sulphuric acid, certain coal-tar colouring matters, explosives, and in the production of various nitrates.

Care must be taken in their selection, however, as certain colouring matters such as red lead are destructive to the cement.

It has been found that by a particular treatment, in which the mixing of large quantities of vegetable colouring agents with the food plays an important part, the ordinary "canary yellow" may be intensified so as to verge upon a more or less brilliant flame colour.'

This type of colouring is also found in genera of quite distinct sub-families of butterflies, namely in Danainae and Pierinae, as well as in some diurnal moths, all of which occur in the same district as the Ithomiinae.

The enclosed alga is protected by the threads (hyphae) of the fungus, and supplied with water and salts and, possibly, organic nitrogenous substances; in its turn the alga by means of its green or blue-green colouring matter and the sun's energy manufactures carbohydrates which are used in part by the fungus.

Colouring Matters.

It is cut in the volcanic plateau, and its ragged broken walls, which are inclined at very steep angles, are of a richness of colouring that almost defies description, a colouring that is produced by the action of the thermal springs, at the base of the canyon, upon the mineral pigments in the lava.

As in other cell-walls, so here the older membranes may be altered by deposits of various substances, such as resin, calcium oxalate, colouring matters; or more profoundly altered throughout, or in definite layers, by lignification, suberization (Trametes, Daedalea), or swelling to a gelatinous mucilage (Tremella, Gymnosporangium), while cutinization of the outer layers is common.

If this colouring process is properly executed it remains fairly fast.

In Paris, too, they obtain beautiful results in the "topping" or colouring Russian sables and the Germans are particularly successful in dyeing Persian lambs black and foxes in all blue, grey, black and smoke colours and in the insertion of white hairs in imitation of the real silver fox.

This suggests that the colouring of the okapi is of purely protective type.

The lion belongs to the genus Fells of Linnaeus (for the characters and position of which see Carnivora), and differs from the tiger and leopard in its uniform colouring, and from all the other Felidae in the hair of the top of the head, chin and neck, as far back as the shoulder, being not only much longer, but also differently disposed from the hair elsewhere, being erect or directed forwards, and so constituting the characteristic ornament called the mane.

The cells of the epidermis are very closely united laterally and contain no green colouring matter (chlorophyll) except in the pair of cells - guard-cells - which bound the stomata.

Before its fall the leaf has become dry owing to loss of water and the removal of the protoplasm and food substances to the stem for use next season; the red and yellow colouring matters are products of decomposition of the chlorophyll.

Grand rugged cliffs line the coast; while, inland, the country is celebrated for the rich colouring of its woods and glens.

His narrative contains frequent repetitions and contradictions, is without colouring, and monotonous; and his simple diction, which stands intermediate between pure Attic and the colloquial Greek of his time, enables us to detect in the narrative the undigested fragments of the materials which he employed.

The interior is fine, harmonious and restrained, painted in white and grey, while the colouring of the exterior is less pleasing.

Fungi Algae Bryophyta Pteridophyta Phanerogamia Gymnosperms Angiosperms Algae in this wide sense may be briefly described as the aggregate of those simpler forms of plant life usually devoid, like the rest of the Thallophyta, of differentiation into root, stem and leaf; but, unlike other Thallophyta, possessed of a colouring matter;.

It is true that certain Bryophyta (Marchantiaceae, Anthoceroteae) possess a thalloid structure similar to that of Thallophyta, and are at the same time possessed of the colouring matter of the Green Algae.

On the other hand, certain undoubted animals (Stentor, Hydra, Bonellia) are provided with a green colouring matter by means of which they make use of atmospheric carbonic acid.

In all cases the loss of the colouring matter is associated with an incapacity to take up carbon from so simple a compound as carbonic acid.

The cells are for the most part exceedingly minute, and are not easy to free from their colouring matters, so that investigation has been attended with great difficulty.

With reference to the existence of a chromatophore, he with others finds the colouring matter localized in granules in the peripheral region, but does not consider these individually or in the aggregate as chromatophores.

Algae are withdrawn from each of the three series enumerated above and consolidated into an entirely new group. In these algae, the colouring matter is said to be yellowish-green, not strictly green, and contained in numerous small discoid chromatophores which are devoid of pyrenoids.

The zoospore is usually a pyriform mass of naked protoplasm, the beaked end of which where the cilia arise is devoid of colouring matter.

Of these the first three include multicellular plants, some of them of great size; the last three are unicellular organisms, with little in common with the rest excepting the possession of a brown colouring matter.

No unicellular Rhodophyceae are known, although a flagellate organism, Rhodomonas, has recently been described as possessed of the same red colouring matter.

A similar festal intention in design and colouring, with similar mastery in passages and even less sense of harmonious relations in the whole, is apparent in a second important picture painted by Darer at Venice, "The Virgin and Child with the Goldfinch," formerly in the collection of Lord Lothian and now at Berlin.

The okapi (Ocapia), which is also African but restricted to the tropical forest-region, in place of being an inhabitant of more or less open country, represents a second genus, characterized by the shorter neck and limbs, the totally different type of colouring, and the restriction of the horns to the male sex, in which they form a pair on the forehead; these horns being more compressed than FIG.

The sombre colouring is relieved by vegetation along the edges of the nearly flat beds which project like great cornices and serve as nesting-places for sea-fowl.

The resplendent medieval colouring of the subject, the essentially heroic character of Joan of Arc, gave Schiller an admirable opportunity for the display of his rich imagination and rhetorical gifts; and by an ingenious alteration of the historical tradition, he was able to make the drama a vehicle for his own imperturbable moral optimism.

The supposition of a Solomonic authorship for Proverbs is excluded by the whole colouring of the book, in which monotheism and monogamy are assumed, without discussion, to be generally accepted, while in Solomon's time and by Solomon's self the worship of many gods and the taking of more than one wife were freely practised, without rebuke from priest or prophet.

For ornamental work lacquering divides favour with colouring - sometimes done with coloured lacquers, but often with chemical colourings, of which the copper and iron salts are the chief basis.

Caustic soda is used in very large quantities in the manufacture of soap, paper, textile fabrics, alizarin and other colouring matters, and for many other purposes.

This prejudice, establishing itself in familiar speech, has descended from antiquity to modern times, colouring, when it does not distort, the narratives of biographers and the criticisms of commentators.

But, as it involved the grandson of the Prophet, the son of Ali, and so many members of his family, Hosain's devout partisans at Kufa, who by their overtures had been the principal cause of the disaster, regarded it as a tragedy, and the facts gradually acquired a wholly romantic colouring.

And, quite apart from their political colouring, such attempts to meet the devotional tastes of the masses as the miracles of Lourdes, or the modern French religious press, lie well within the range of criticism.

French society assumed a strong Italian colouring, nor were the manners of the court very different from those of an Italian city, except that externally they remained ruder and less polished.

The result of their endeavour was immediately apparent in the new force added to French rhythm, the new pomp, richness, colouring and polish conferred upon poetic diction.

His most original compositions in verse, however, are elegiac and hendecasyllabic pieces on personal topics - the De conjugali amore, Eridanus, Tumuli, Naeniae, Baiae, &c. - in which he uttered his vehemently passionate emotions with a warmth of southern colouring, an evident sincerity, and a truth of painting from reality which excuse their erotic freedom.

This consists chiefly of cream of tartar (bitartrate of potash), tartrate of lime, yeast cells and of albuminous and colouring matters.

In the case of red wines colouring matter is dissolved from the skins and a certain amount of mineral matter and tannin is extracted.

As the wine matures the most noticeable feature in the first instance is the reduction in the acidity, which is mainly due to a deposition of tartar, and the disappearance of tannin and colouring matter, due to fining and the action of oxygen.

The softening effect of age is due to the deposition of a part of the tartar together with a part of the tannin and some of the colouring matter.

Hand in hand with the development of a disagreeable bitter taste there is a precipitation of colouring matter and the formation of certain disagreeable secondary constituents.

For this reason it is necessary that the process of collection, separation and pressing should proceed as quickly as possible at vintage time in order that the juice may not, through incipient fermentation, dissolve any of the colouring matter from the skins.

Owing to its position at the junction of several routes, Kerkuk has a brisk transit trade in hides, Persian silks and cottons, colouring materials, fruit and timber; but it owes its principal importance to its petroleum and naphtha springs.

This momentous change, which was to give a martial colouring to the whole policy of Sweden for the next hundred and twenty years, Regular dates from a decree of the Riksdag of Linkoping Army.

It is, however, to be noted that Shelley's "Letter to Maria Gisborne" (1820), Keats's "Epistle to Charles Clarke" (1816), and Landor's "To Julius Hare" (1836), in spite of their romantic colouring, are genuine Horatian epistles and of the pure Augustan type.

The best crop is the first of the season, which consists of the unimpregnated females; the later crops contain an admixture of young insects and skins, which contain proportionally little colouring matter.

The fifth is a social picture of the degradation to which poor guests were exposed at the banquets of the rich, but many of the epigrams of Martial and the more sober evidence of one of Pliny's letters show that the picture painted by Juvenal, though perhaps exaggerated in colouring, was drawn from a state of society prevalent during and immediately subsequent to the times of Domitian.

The subject is St Roch, the patron saint of lepers, and the colouring of the scaly skin of the leper in the forefront of the picture is generally regarded as one of the master's most striking effects.

Apart from this variety, and from the historic interest of such places as Braga, Bussaco, Cintra, Coimbra, or Torres Vedras, the attractiveness of the country is due to its colouring, and not to grandeur of form.

The protoplasm itself may be tinged with colouring matter, bright red, yellow, &c., and may occasionally contain substances other than the deeply-staining granules.

Considerable advances in our knowledge of the various chromogenic bacteria have been made by the studies of Beyerinck, Lankester, Engelmann, Ewart and others, and have assumed exceptional importance owing to the discovery that Bacteriopurpurin - the red colouring matter contained in certain sulphur bacteria - absorbs certain rays of solar energy, and enables the organism to utilize the energy for its own life-purposes.

Engelmann showed, for instance, that these red-purple bacteria collect in the ultra-red, and to a less extent in the orange and green, in bands which agree with the absorption spectrum of the extracted colouring matter.

In the case of these red-purple bacteria the colouring matter is contained in the protoplasm of the cell, but in most chromogenic bacteria it occurs as excreted pigment on and between the cells, or is formed by their action in the medium.

He concluded that the gases are due to the decomposition of an organic colouring matter, which has, however, no connexion with the fluorescence or thermo-luminescence of the mineral.

It is, moreover, remarkable for the prominence of its brow-ridges, beneath which the small and closely approximated eyes are deeply sunk; the immense size of the canine teeth; and more especially for the extraordinarily vivid colouring of some parts of the skin.

The female is of much smaller size, and more slender; and, though the general tone of the hairy parts of the body is the same, the prominences, furrows, and colouring of the face are much less marked.

As it was, while they slavishly clung to its substance, they succeeded, as a rule, in destroying all traces of its original form and colouring.

Similarly, though the influence of rhetoric upon his language, as well as upon his general treatment, is clearly perceptible, he has not the perverted love of antithesis, paradox and laboured word-painting which offends us in Tacitus; and, in spite of the Venetian richness of his colouring, and the copious flow of his words, he is on the whole wonderfully natural and simple.

They are in the Byzantine style and the colouring is gaudy.

For this reason those barks which, like C. Calisaya, C. officinalis, and C. Ledgeriana, contain but little colouring matter are preferred, the quinine being more easily extracted from them in a colourless form.

Another method consists in mixing the powdered bark with milk of lime, drying the mass slowly with frequent stirring, exhausting the powder with boiling alcohol, removing the excess of alcohol by distillation, adding sufficient dilute sulphuric acid to dissolve the alkaloid and throw down colouring matter and traces of lime, &c., filtering, and allowing the neutralized liquid to deposit crystals.

The richness of colouring on which Vasari expatiates has indeed flown, partly from injury, partly because in striving for effects of light and shade the painter was accustomed to model his figures on a dark ground, and in this as in his other oil-pictures the ground has to a large extent come through.

The colouring, however, is only visible when the wings are expanded and in use.

Bromine and bromine water both bleach organic colouring matters.

The saurians are represented on land by several species of lizard, some of them conspicuous for their brilliant colouring, and by the large "iguana," whose flesh is considered a great delicacy.

Brazilwood (Caesalpinia echinata), valuable for its timber and colouring extract, and "roco" (Bixa orellana), the "urucn" of Brazil which furnishes the anatto of commerce, are widely distributed in central and southern Colombia, and another species of the first-named genus, the C. coariaria, produces the "divi-divi" of the Colombian export trade - a peculiarly shaped seed-pod, rich in tannic and gallic acids, and used for tanning leather.

And the deep colouring of the South, on days when the sunshine blazes least, had been caught by him and presented nobly at Antibes and Villefranche.

The prevailing colour of the iguanas is green; and, as the majority of them are arboreal in their habits, such colouring is generally regarded as pro FIG.

They are timid, defenceless animals, depending for safety on the comparative inaccessibility of their arboreal haunts, and their protective colouring, which is rendered even more effective by their remaining still on the approach of danger.

The brilliant colouring which is so conspicuous in an Athenian sunset is due to the same cause.

None of the Petrels are endowed with any brilliant colouring - sootyblack, grey of various tints (one of which is often called "blue"), and white being the only hues the plumage exhibits.

The avi-fauna is much richer than the mammalian, and, although wanting the 'largest birds as well as the most brilliantly coloured, comprises two hundred and sixty species, half of which are endemic. Many of the birds are remarkable not so much for their shape or colouring as for their distant relationships; many belong to peculiar genera, and some are so isolated that new families have had to be formed for their reception.

Their sandy or chestnut colouring assimilates them to the horse, and separates them widely from the African wild asses, which are grey.

She translated Sensier's biography of Millet, and painted, before her marriage in 1874, studies in flowers and ideal heads, much admired for their feeling and delicate colouring.

As a rule they are highly coloured, the colouring matter being contained in the cell-sap, as in blue or red flowers, or in plastids (chromoplasts), as generally in yellow flowers, or in both forms, as in many orange-coloured or reddish flowers.

Since the methods of preparing the vegetable and animal fats are comparatively crude ones, they usually contain certain impurities of one kind or another, such as colouring and mucilaginous matter, remnants of vegetable and animal tissues, &c. For the most part these foreign substances can be removed by processes of refining, but even after this purification they still retain small quantities of foreign substances, such as traces of colouring matters, albuminoid and (or) resinous substances, and other foreign substances, which remain dissolved in the oils and fats, and can only be isolated after saponification of the fat.

The oil exuding in the cold dissolves the smallest amount of colouring matter, &c., and hence has suffered least in its quality.

Naphtha is preferable for oil seeds, as it extracts neither resins nor gummy matters from the oil seeds, and takes up less colouring matter than carbon bisulphide.

There is still a wide field open for the application of proper processes for the removal of impurities and colouring matters without running the risk of attacking the oil or fat itself.

Days were grouped according to the intensity of colouring of ozone papers, o representing no visible effect, and 14 the darkest colour reached.

Softness of outline, warmth of colouring, a fine and almost voluptuous feeling for beauty of every kind, and a pleading and melancholy tenderness-such were the elements of the spell which he threw round the sympathies of his reader, and which his compatriots expressed by the vague but expressive word blanditia.

By far the most remarkable of all the Old World domesticated breeds is, however, the royal Siamese cat, which almost certainly has an origin quite distinct from that of the ordinary European breeds; this being rendered evident not only by the peculiar type of colouring, but likewise by the cry, which is quite unmistakable.

Other east African monkeys with a similar type of colouring, which, together with the wholly black west African C. satanas, collectively constitute the subgenus Guereza, may be included under the same title; and the name may be further extended to embrace all the African thumbless monkeys of the genus Colobus.

They contain, under the title Doctrine of Democritus, a fairly methodical treatise in ten books comprising the Argyropoeia and Chrysopoeia of the pseudo-Democritus, with many receipts for colouring metals, making artificial precious stones, effecting the diplosis or doubling of metals, &c. They give illustrations of the apparatus employed, and their close relationship to the Greek is attested by the frequent occurrence of Greek words and the fact that the 1 An alchemistical work bearing the name of Ostanes speaks of a divine water which cures all maladies - an early appearance of the universal panacea or elixir of life.

The one-sided specialization and the peculiar metallic colouring of the lateral tail feathers mark them as the extreme terms of a degenerative series, whilst the symmetry, likeness of constituent parts inter se, and absence of specialized pigment, as well as the fact that they differ little from any average feather of birds in general, mark the contour feather as primitively simple, and as the starting-point from which the highly elaborated eye-painted tail feather has gradually evolved.

These corpuscles may break down in the blood vessels, and their colouring material (haemoglobin) is set free in the serum.

To this list should also be added the common wild tulip, the Italian cyclamen, the common scarlet poppy, the fennel, wild carrot and many varieties of thistle, some of gorgeous colouring.

The oxygen contained in that fluid, and destined for consumption by the tissues, is retained by the influence of alcohol in its combination with the haemoglobin or colouring matter of the red blood corpuscles.

His perception of the analogy between it and ammonia led to his famous work on the amines and ammonium bases and the allied organic phosphorus compounds, while his researches on rosaniline, which he first prepared in 1858, formed the first of a series of investigations on colouring matters which only ended with quinoline red in 1887.

He may have The younger Forster remarked that the birds of Norfolk Island, though believed by the other naturalists of Cook's ship to be generally the same as those of New Zealand, were distinguished by their brighter colouring (see also Nestor).

It is employed commercially in the production of colouring matters (see Benzophenone), and for various synthetic processes.

Silk fibre (see Fibres) consists essentially of a centre or core of fibroin, with a covering of sericin or silk albumen, and a little waxy and colouring matter.

They were doubtless too courteous to add that fine colours do not make fine colouring.

They are remarkable for skill in the massing of light and shade, richness and delicacy of colouring, and for the admirable style in which the drapery of the figures is handled, Bartolommeo having been the first to introduce and use the lay-figure with joints.