It is tasteless, colourless and odourless gas, which is exceedingly stable and inert.
When perfectly pure, carbon bisulphide is a colourless, somewhat pleasant smelling, highly refractive liquid, of specific gravity 1 2661 (18°/4°) (J.
The colour varies somewhat with the chemical composition, being grey or colourless in chlorargyrite, greenish-grey in embolite and bromargyrite, and greenish-yellow to orange-yellow in iodembolite.
As a general rule, hydrocarbons are colourless; the exceptions include the golden yellow acenaphthylene, the red bidiphenylene-ethylene, and the derivatives of fulvene CH: CH >CH 2, which have been discussed by CH: CH J.
The colour produced is generally of a greenish shade; for example, nitrosobenzene is green when fused or in solution (when crystalline, it is colourless), and dinitrosoresorcin has been employed as a dyestuff under the names " solid green " and " chlorine."
These are washed with ammonium chloride until the filtrate is colourless, ignited, fused with caustic potash and nitre, the melt dissolved in water and nitric acid added to the solution until the colour of potassium ruthenate disappears.
Potassium ruthenium cyanide, K4Ru(CN) 6.3H 2 O, formed when potassium ruthenate is boiled with a solution of potassium cyanide, crystallizes in colourless plates which are soluble in water.
If the hot bead is colourless and remains clear on cooling, we may suspect the presence of antimony, aluminium, zinc, cadmium, lead, calcium and magnesium.
Examples of the first case are found among the colourless acridines and quinoxalines which give coloured salts; of the second case we may notice the colourless hydrochloride and sulphate of the deep yellow o-aminobenzophenone.
With acid substances, the combination with " colourless " metals, i.e.
It is a colourless pungent gas which is exceedingly soluble in water.
It is a colourless, highly refracting liquid, boiling at 78°; it fumes on exposure to moist air.
If the bead is coloured we may have present: cobalt, blue to violet; copper, green, blue on cooling; in the reducing flame, red when cold; chromium, green, unaltered in the reducing flame; iron, brownish-red, light-yellow or colourless on cooling; in the reducing flame, red while hot, yellow on cooling, greenish when cold; nickel, reddish to brownish-red, yellow to reddish-yellow or colourless on cooling, unaltered in the reducing flame; bismuth, yellowish-brown, light-yellow or colourless on cooling; in the reducing flame, almost colourless, blackish-grey when cold; silver, light yellowish to opal, somewhat opaque when cold; whitish-grey in the reducing flame; manganese, amethyst red, colourless in the reducing flame.
metals producing colourless salts with acids, is attended by colour changes contrary to those given above, auxochromic combination being accompanied by a deepening, and chromophoric by a lessening of the tint.
He has also shown that the nitrophenols yield, in addition to the colourless true nitrophenol ethers, an isomeric series of coloured unstable quinonoid aci-ethers, which have practically the same colour and yield the same absorption spectra as the coloured metallic salts.
(3) If a colourless compound gives a coloured one on solution or by salt-formation, the production of colour may be explained as a particular form of ionization (Baeyer), or by a molecular rearrangement (Hantzsch).
Cyanogen is a colourless gas, possessing a peculiar characteristic smell, and is very poisonous.
It burns with a purple flame, forming carbon dioxide and nitrogen; and may be condensed (by cooling to - 25° C.) to a colourless liquid, and further to a solid, which melts at - 34.4° C. (M.
Boron dissolves in molten aluminium, and on cooling, transparent, almost colourless crystals are obtained, possessing a lustre, hardness and refractivity near that of the diamond.
A saturated solution of the gas, in water, is a colourless, oily, strongly fuming liquid which after a time decomposes, with separation of metaboric acid, leaving hydrofluoboric acid HF BF3 in solution.
It is a colourless fuming liquid boiling at 90.5° C. With water and with ammonia it undergoes the same reactions as the chloride.
It is a colourless liquid, which possesses a very disagreeable smell, and boils at 168° C.
With basic substances, the chromophoric combination with a colourless acid is generally attended by a deepening in colour; auxochromic combination, on the other hand, with a lessening.
Mention may be made of the phenomenon of halochromism, the name given to the power of colourless or faintly-coloured substances of combining with acids to form highly-coloured substances without the necessary production of a chromophoric group. The researches of Adolf von Baeyer and Villiger, Kehrmann, Kauffmann and others, show that this property is possessed by very many and varied substances.
By the action of zinc methyl on ethyl borate, in the requisite proportions, boron trimethyl is obtained, thus :-2B(OC2H5)2+ 6Zn(CH 3) 2 =2B(CH 3) 3 +6Zn< OC2H5 as a colourless spontaneously inflammable gas of unbearable smell.
In Aeolosoma it is usually colourless.
The blood is colourless.
This grouping is not always colour-producing, since diphenyl is colourless.
It is a feebly basic, colourless liquid which boils at 130° C., and possesses a smell resembling that of chloroform.
Salicylic acid crystallizes in small colourless needles which melt at 1 55° C. It is sparingly soluble in cold water, but readily dissolves in hot.
Normal butyl alcohol, CH 3 (CH 2) 2 CH 2 OH, is a colourless liquid, boiling at 116.8°, and formed by reducing normal butyl aldehyde with sodium, or by a peculiar fermentation of glycerin, brought about by a schizomycete.
Another view is that the colour is due to some comparatively simple substance suspended in a colourless medium.
They are either colourless liquids, which boil without decomposition, or crystalline solids; and are both basic and acidic in character.
Soc., 18 9 8, 73, p. 35 2) as a colourless liquid by the addition of hydroxylamine hydrochloride to an aqueous solution of formaldehyde in the presence of sodium carbonate; the resulting solution was extracted with ether and the oxime hydrochloride precipitated by gaseous hydrochloric acid, the precipitate being then dissolved in water, the solution exactly neutralized and distilled.
Nitrogen is a colourless, tasteless and odourless gas, which is only very slightly soluble in water.
Priestley, who obtained it by reducing nitrogen peroxide with iron, may be prepared by heating ammonium nitrate at 170-260° C., or by reducing a mixture of nitric and sulphuric acid with zinc. It is a colourless gas, which is practically odourless, but possesses a sweetish taste.
It is a colourless gas which is only sparingly soluble in water.
At low temperatures it is a colourless crystalline solid which melts at -10.14° C. (W.
The salts of the acid are colourless or faintly yellow.
It crystallizes in colourless plates melting at 20°C. and boiling at 202°C.; it is insoluble in water, but readily dissolves in the ordinary organic solvents.
Thus para-nitrophenol has colourless molecules, but an intensely yellow negative ion.
In neutral, and still more in acid solutions, the dissociation of the indicator is practically nothing, and the liquid is colourless.
The colourless or amber-coloured filtrate is concentrated to 27° to 28° B., when it forms the "heavy liquor," just mentioned.
This is filtered through fresh bone-char filters, from which it is discharged as a practically colourless liquid.
The different kinds of mica vary from perfectly colourless and transparent - as in muscovite - through shades of yellow, green, red and brown to black and opaque - as in lepidomelane; the former have a pearly lustre and the latter a submetallic lustre on the cleavage surfaces.
Phlogopite is rarely found as colourless transparent sheets and is therefore almost exclusively used for electrical purposes.
By dissolving red lead, Pb304, in glacial acetic acid and crystallizing the filtrate, colourless monoclinic prisms of lead tetracetate, Pb(C2H302)4, are obtained.
It forms colourless transparent crystals, soluble in one and a half parts of cold water and in eight parts of alcohol, which on exposure to ordinary air become opaque through absorption of carbonic acid, which forms a crust of basic carbonate.
Solutions of lead salts (colourless in the absence of coloured acids) are characterized by their behaviour to hydrochloric acid, sulphuric acid and potassium chromate.
It crystallizes in colourless plates or needles, which melt at 99° C. Its solutions in alcohol and ether have a faint blue fluorescence.
These are colourless crystalline compounds, which are most readily prepared by passing ammonia gas into an ethereal solution of the aldehyde.
It is prepared by oxidizing ethyl alcohol with dilute sulphuric acid and potassium bichromate, and is a colourless liquid of boiling point 20ï¿½8° C., possessing a peculiar characteristic smell.
It is a colourless liquid of specific gravity oï¿½8314 (20°/4°) (J.
It is a colourless liquid, with a very pungent smell, and attacks the mucous membrane very rapidly.
Salicylic aldehyde (ortho-hydroxybenzaldehyde), HO(I)ï¿½ C 6 H 4 ï¿½CHO(2), an aromatic oxyaldehyde, is a colourless liquid of boiling point 196° C. and specific gravity.
It is a colourless aromatic-smelling oily liquid, which boils at 247° C. and readily oxidizes on exposure.
The nitro compounds are colourless, somewhat pleasant smelling liquids, which distil without decomposition and possess boiling points much higher than those of the isomeric nitrous esters.
Nitromethane, CH 3 NO 2, is a colourless oil which boils at 101° C. Fuming sulphuric acid decomposes it into carbon monoxide and hydroxylamine.
Nitroethane, C2H5N02, is a colourless liquid which boils at 114° C. Nitroform (trinitromethane), CH(N03)3, is obtained in the form of its ammonium salt by the decomposition of trinitroacetonitrile with water (L.
It is a colourless crystalline solid which melts at 15° C. and has the properties of a strong acid.
It is a colourless oily liquid which boils at 225°-227° C., is somewhat soluble in water, and does not give a coloration with ferric chloride.
They are colourless solids which are readily soluble in water and possess the character of weak acids.
They discriminate between the red or erythro-salts, which are well crystallized, very explosive and unstable compounds, and which regenerate the colourless nitrolic acid on the addition of dilute mineral acids, and the leuco-salts, which are colourless salts obtained by warming the erythro-salts or by exposing them to direct sunlight.
An intensely yellow acid salt is described, as is also a very unstable colourless salt which could not be examined further owing to its very labile nature.
It is a colourless solid which melts at 54° C. to a deep blue liquid.
On Dec. 27 1912 Cuvaj was replaced by a colourless official, Dr. Unkelhausser, who marked time until a fresh candidate for the post of commissary or dictator was forthcoming in the person of Baron Skerlecz (July 23 1913).
He also made If we remember that by " blood " Aristotle understood " red blood," and that he did not know of the existence of colourless blood, his primary division is not a bad one.
It is a colourless fuming liquid of specific gravity 2.269 at o°; it freezes at - 33° C., and boils at I13.9°.
Stannous salt solutions yield a brown precipitate of SnS with sulphuretted hydrogen, which is insoluble in cold dilute acids and in real sulphide of ammonium, (NH 4) 2 S; but the yellow, or the colourless reagent on addition of sulphur, dissolves the precipitate as SnS 2 salt.
It is a colourless oil boiling at 247° C., and having a spicy odour.
A "transudate" is a liquid having a composition resembling that of blood-serum, while the term "exudate" is applied to an effused liquid whose composition approaches that of the blood-plasma in the relationship of its solid and liquid parts, besides in most cases containing numbers of colourless blood-corpuscles.
If oxide of copper is added to a glass mixture containing a strong reducing agent, a glass is produced which when first taken from the crucible is colourless but on being reheated develops a deep crimson - ruby colour.
These glasses may be colourless or coloured.
The latter are made by dipping a small mass of molten colourless glass into an iron cup around the inner wall of which short lengths of white cane have been arranged at regular intervals.
They, moreover, suggested the introduction for the manufacture of table-glass of a material similar in texture to that used by the Venetians, both colourless and tinted.
For the highest quality of bottles, which are practically colourless, sand, limestone and sulphate and carbonate of soda are used.
The invention of colourless Bohemian glass brought in its train the practice of cutting glass, a method of ornamentation for which Venetian glass, from its thinness, was ill adapted.
A more important outcome, however, of Italian influence was the production, in emulation of Venetian glass, of a glass made of refined potash, lime and sand, which was more colourless than the material it was intended to imitate.
This colourless potash-lime glass has always been known as Bohemian glass.
To the Germans must be credited the discovery, or development, of colourless potash-lime glass, the reintroduction of the crafts of cutting and engraving on glass, the invention by H.
About 1350 considerable quantities of colourless flat glass were supplied by John Alemayn of Chiddingfold for glazing the windows in St George's chapel, Windsor, and in the chapel of St Stephen, Westminster.
It is the most brilliant and the most colourless of all glasses, and was undoubtedly first perfected in England.
When pure, it is a colourless gas which is not spontaneously inflammable at ordinary temperature and pressure, but a slight increase of temperature or decrease of pressure sets up decomposition.
These are passed through a vessel surrounded by a freezing mixture and on fractionating the product the hydride distils over as a colourless liquid which boils at 52° C. It is also obtained by the decomposition of lithium silicide with concentrated hydrochloric acid.
It is a colourless, strongly fuming gas which has a suffocating smell.
Ruff and Curt Albert (Ber., 1905, 38, p. 53) by decomposing titanium fluoride with silicon chloroform in sealed vessels at 100 -120° C. It is a colourless gas which may be condensed to a liquid boiling at -80 2° C. On solidification it melts at about -110° C. The gas is very unstable, decomposing slowly, even at ordinary temperatures, into hydrogen,, silicon fluoride and silicon: 4SiHF 3 =2H 2 +3SiF 4 +Si.
It is a very stable colourless liquid which boils at 58° C. Oxygen only attacks it at very high temperatures.
It is a colourless fuming liquid which boils at 146-148° C. It is decomposed by water, and also when heated between 350° and 1000° C., but it is stable both below and above these temperatures.
It is a colourless liquid which boils at 210° C. Water decomposes it with the formation of silico-mesoxalic acid, HOOSi Si(OH) 2 SiOOH.
It is a colourless liquid which boils at 33° C. It fumes in air and burns with a green flame.
It is a colourless, strongly refracting liquid, which boils at about 220° C., slight decomposition setting in above 150° C. Water decomposes it with production of leucone.
It is a colourless solid which melts at 92° C. For silicon derivatives of the amines see Michaelis, Ber., 1896, 29, p. 710; on asymmetric silicon and the resolution of dl-benzyl-ethyl-propyl-silicol see F.
These normal esters are colourless, pleasantsmelling liquids, which are readily soluble in water.
Dimethylcarbonate, CO(OCH 3) 2, is a colourless liquid, which boils at 90.6° C., and is prepared by heating the methyl ester of chlorcarbonic acid with lead oxide.
Diethylcarbonate, CO(OC2H5)2, is a colourless liquid, which boils at 225.8° C.; its specific gravity is 0.978 (20°) [H.
Silver vapour is blue, potassium vapour is green, many others (mercury vapour, for instance) are colourless.
Benzene is a colourless, limpid, highly refracting liquid, having a pleasing and characteristic odour.
These are minute, oval, colourless spores, which serve to spread the disease over the vineyard and from place to place.
All sugars are colourless solids or syrups, which char on strong heating; they are soluble in water, forming sweet solutions but difficultly soluble in alcohol.
It forms colourless, transparent rhombohedra, like those of Iceland spar; the angles are nearly equal to right angles, being 73° 30', so that the crystals look like cubes: hence the name of "cubic saltpetre."
The salt crystallizes out on cooling with 7 molecules of water, forming colourless orthorhombic prisms, usually small and needle-shaped.
COC 6 H 6 CH Anthracene crystallizes in colourless monoclinic tables which show a fine blue fluorescence.
557.) Titanium fluoride, TiF 4, is a fuming colourless liquid boiling at 284°, obtained by distilling a mixture of titanium oxide, fluorspar and sulphuric acid; by heating barium titanofluoride, BaTiF6 (Emrich, Monats., 1904, 25, p. 907); and by the action of dry hydrofluoric acid on the chloride (Ruff and Plato, Ber., 1904, 37, p. 673).
Titanium ch oride, TiC1 4, is obtained as a colourless filming liquid of 1.7604 sp. gr.
Titanium oxide when fused with microcosmic salt in the oxidizing flame yields a bead which is yellowish in the heat but colourless after cooling.
The primary amines are colourless liquids or crystalline solids, which are insoluble in water, but readily soluble in the common organic solvents.
It crystallizes in small colourless needles and is easily soluble in water; the concentrated aqueous solution dissolves bromine and iodine readily.
It is a colourless, amorphous solid, which is almost insoluble in water, its solubility diminishing with increasing temperature; it is appreciably soluble in concentrated sulphuric acid.
Ethyl oxalate, (C0.0C2H5)2, prepared by boiling anhydrous oxalic acid with absolute alcohol, is a colourless liquid which boils at 186° C. Methyl oxalate (CO.
Pure ethyl alcohol is a colourless, mobile liquid of an agreeable odour.
The solution is filtered and allowed to cool, when colourless rhombic pyramids of the aurocyanide separate.
Potassium auricyanide, 2KAu(CN) 4.3H 2 O, is obtained as large, colourless, efflorescent tablets by crystallizing concentrated solutions of auric chloride and potassium cyanide.
It forms colourless, monoclinic prisms, which turn brown on exposure to air.
Sodium aurothiosulphate, 3Na 2 S 2 O 3 Au2S203.4H20, forms colourless needles; it is obtained in the direct action of sodium thiosulphateongoldinthe presence of an oxidizing agent, or by the addition of a dilute solution of auric chloride to a sodium thiosulphate solution.
Oliveri, Gazz., 1886, 16, p. 493) It crystallizes in colourless needles which melt at 50° C. It possesses a disagreeable faecal odour, sublimes readily, and turns brown on exposure to air.
Weith, Ber., 1880, 13, 1300); or in the form of its acetyl derivative by heating /3-naphthol with ammonium acetate to 270-280° C. It forms odourless, colourless plates which melt at 111-112° C. It gives no colour with ferric chloride.
Acetylene tetrabromide, C 2 H 2 Br 4, which is very conveniently prepared by passing acetylene into cooled bromine, has a density of 3 ooi at 6° C. It is highly convenient, since it is colourless, odourless, very stable and easily mobile.
Its advantages rest on its high density and mobility; its main disadvantages are its liability to decomposition, the originally colourless liquid becoming dark owing to the separation of iodine, and its high coefficient of expansion.
It is almost colourless and has a small coefficient of expansion; its hygroscopic properties, its viscous character, and its action on the skin, however, militate against its use.
It is a colourless crystalline solid which readily fuses to a yellow liquid.
It is a colourless solid and behaves as a dibasic acid.
Some tellurates exist in two forms, a colourless form soluble in water and acids, and a yellow form insoluble in water and acids.
It forms colourless, very hygroscopic prisms, which attack glass, slowly at ordinary temperatures, more rapidly when heated (Ber., 1909, 4 2, p. 49 2).
It is a colourless gas, having a density of 0.92.
Pure methyl alcohol is a colourless mobile liquid, boiling at 66°-67°, and having a specific gravity of 0 8142 at o° C. It has a burning taste, and generally a spirituous odour, but when absolutely pure it is said to be odourless.
If they do not deny that Greek philosophy has entered into Christian doctrine, they consider it a colourless medium used in fixing the contents of revelation.
It forms a colourless vitreous mass, hence its name " glacial phosphoric acid."
At ordinary temperatures it crystallizes from aqueous solutions in large colourless monoclinic prisms, which effloresce in dry air, and at 35° C. melt in their water of crystallization.
He composed his Cabinet of colourless officials and confessed adherents of the various nationalities.
473), and is a colourless oil which boils at 261° C. (10 mm.).
The sulphydrate or hydrosulphide, Ca(SH)2, is obtained as colourless, prismatic crystals of the composition Ca(SH) 2.6H 2 O, by passing sulphuretted hydrogen into milk of lime.
The strong aqueous solution deposits colourless, four-sided prisms of the hydroxy-hydrosulphide, Ca(OH) (SH).
Ammonia is a colourless gas possessing a characteristic pungent smell and a strongly alkaline reaction; it is lighter than air, its specific gravity being oï¿½589 (air =1).
It crystallizes in colourless prisms, possessing a saline taste; it sublimes on heating and is easily soluble in water.
It forms colourless crystals which are soluble in water and decompose on heating, with the formation of nitrogen.
The perfectly anhydrous acid is a very volatile colourless liquid and is best obtained, according to G.
Its use appears to have spread more rapidly outside Germany than in Germany itself, one cause of its popularity being that it was negative and colourless, and could thus be applied by adherents of the "old religion" to those of the "new religion," without giving offence, on occasions when it was expedient to avoid abusive language.
His first step when he was admitted to the European committee, which was in the plans of the allies to act so colourless a part, was to ignore the position of the Four and to assert that only the congress as a whole could give the committee full powers.
On heating it melts at 95.6° (Bunsen) to a liquid resembling mercury, and boils at 877.5° (Ruff and Johannsen, Ber., 1905, 38, p. 3601), yielding a vapour, colourless in thin layers but a peculiar purple, with a greenish fluorescence, when viewed through thick layers.
When anhydrous it is a colourless opaque solid which melts at 310 °, and decomposes at about 110o°.
The anhydrous salt is a colourless powder or porous mass, having an alkaline taste and reaction.
It is a colourless transparent glass mass, which dissolves in boiling water to form a thick liquid.
In microscopic section the best slates show much colourless mica in small, thin, irregular scales.
Graphite is black and opaque, whilst diamond is colourless and transparent; it is one of the softest (H= I) of minerals, and diamond the hardest of all; it is a good conductor of electricity, whilst diamond is a bad conductor.
It is a colourless gas which may be liquefied by a pressure of 7 to 8 atmospheres.
At ordinary temperatures it is a colourless gas, possessing a penetrating and suffocating smell.
It is a colourless, odourless gas of specific gravity 0.967 (air = I).
It is a colourless gas, possessing a faint pungent smell and a slightly acid taste.
It is a colourless gas, possessing an unpleasant pungent smell.
It Is A Colourless, Odourless Gas, Which Burns With A Blue Flame And Is Decomposed By Heat.
Quinone-dioxime, HON: C 6 H 4: NOH, crystallizes in colourless or yellow needles, which decompose when heated to about 240° C. Potassium ferrocyanide in alkaline solution oxidizes it to dinitrosobenzene, whilst cold concentrated nitric acid oxidizes it to para-dinitrobenzene.
The fused product solidifies on cooling into a colourless glass.
In appearance it closely resembles the chloride, forming colourless cubes which readily dissolve in water and melt at 722°.
It forms colourless cubes which are readily soluble in water, melt at 685°, and yield a vapour of normal density.
The salt is thus obtained as a white porous mass, fusible at a red heat (838° C., Carnelley) into a colourless liquid, which solidifies into a white opaque mass.
It is readily soluble in water, and on evaporation in a vacuum over caustic lime it deposits colourless, rhombohedral crystals of 2KHS.H 2 0.
The solution has a bitter taste, and on exposure to the air turns yellow, but on long exposure it recovers its original colourless appearance owing to the formation of thiosulphate.
But in any case the Greek language hardly offered another word for an organ of revelation so colourless as arp04, rns, while the condition of etymology among the ancients made it possible to interpret it as having a special reference to prediction (so Eusebius, Dem.
The order of the successive colours in all colourless transparent media is red, orange, yellow, green, blue, indigo and violet.
It crystallizes from water in colourless rhombic prisms, containing four molecules of water of crystallization, and possesses a very acid reaction.
This fact, combined with the colourless record of their candidate, enabled them to sweep the country at the November election.
It is a colourless sharp-smelling gas which fumes strongly on exposure to air.
The saturated aqueous solution is colourless and fumes strongly on exposure to air; after a time it darkens in colour owing to liberation of iodine.
It is a colourless, crystalline, deliquescent solid which melts at 135° C., and at 140° C. is completely decomposed into iodine pentoxide, water and oxygen.
The free acid is a colourless liquid with a smell resembling bitter almonds; it boils at 26.1° C., and may be solidified, in which condition it melts at -14° C. It burns with a blue flame,.
Potassium cyanide is an excessively poisonous, colourless, deliquescent solid; it is readily soluble in water, but almost insoluble in absolute alcohol.
They are mostly colourless liquids which boil without decomposition, or solids of low melting point.
They are colourless liquids, readily soluble in alcohol and in ether, but insoluble in water.
Formic acid is a colourless, sharp-smelling liquid, which crystallizes at 0° C., melts at 8.6° C. and boils at 100.8° C. Its specific gravity is 1.22 (20°/4°).
The benzene layer on evaporation deposits the antipyrine as a colourless crystalline solid which melts at 113° C. and is soluble in water.
Many of the crystals are parti-coloured, the blue being distributed in patches in a colourless or yellow stone; but by skilful cutting, the deep-coloured portion may be caused to impart colour to the entire gem.
Hence clear colourless corundum is known as white sapphire or "leucosapphire."
It contains, in addition to tannin, a peculiar principle called larixin, which may be obtained in a pure state by distillation from a concentrated infusion of the bark; it is a colourless substance in long crystals, with a bitter and astringent taste, and a faint acid reaction; hence some term it larixinic acid.
Benzaldehyde is a colourless liquid smelling of bitter almonds.
Magnesium Nitrate, Mg(NO 3) 2.6H 2 O, is a colourless, deliquescent, crystalline solid obtained by dissolving magnesium or its carbonate in nitric acid, and concentrating the solution.
It slowly decomposes in moist air, liberating sulphuretted hydrogen, and with water it gives a yellow solution which becomes colourless on exposure.
Strychnine crystallizes from alcohol in colourless prisms, which are practically insoluble in water, and with difficulty soluble in the common organic solvents.
Nitric acid is a colourless strongly fuming liquid, having a specific gravity of 1.50394 (24.2° C.) (V.
It has recently been ascertained that the coloration of certain sponges is due to the interaction of an oxydizing ferment, tyrosinase, upon certain colourless chromogenic substances.
If either one of these two is absent the plant is colourless.
Turning now to instances of the opposite kind, it is known that silkworms which spin colourless cocoons are more resistant to the attacks of a certain deadly fungus than are those which spin the yellow ones.
But about 7% showed an exceedingly limited coagulation, in which the clot was colourless and flocculent, and confined to the heart.
If these vertical faces become very numerous, the eye will perceive a colourless horizontal circle.
The different values of the angle of minimum deviation for rays of different refrangibilities give rise to spectral colours, the red being nearest the sun, while farther away the overlapping of the spectra forms a flaming colourless tail sometimes extending over as much as ro° to 20 °.
A pair of triangular prisms having a common face, or a stellate crystal formed by the symmetrical interpenetration of two triangular prisms admits of two internal reflections by faces inclined at 120°, and so give rise to two colourless images each at an angular distance of 120° from the sun.
The emerging rays are parallel to their original direction and form a colourless image on the parhelic circle opposite the sun.
These were investigated by Tulasne in 1853, who gave them the name spermogonia The lower, ventral portion of the sperm09' gonium is lined by delicate hyphae, the sterigmata, which give origin to minute colourless cells, the spermatia.
The paraphyses; (which may be absent entirely in the Pyrenolichens) are erect, colourless filaments which are After Tulasne, from De Bary's Vergleichende Morphologie and Biologie der Pilze, Mycetozoen and Bacterien, by permission of Wilhelm Engelmann.
In the first case the spores are usually colourless, the second case always brown.
Spores unicellular, parallel-multicellular or muriform, usually colourless, cross-walls usually thin.
It forms colourless crystals, melting at 90°, and boiling at 265°-270°.
It forms colourless crystals, melting at 185°, and boiling at 360°.
Castor oil is a viscid liquid, almost colourless when pure, possessing only a slight odour, and a mild yet highly nauseous and disagreeable taste.
CHLOROFORM (trichlor-methane), CHC1 3, a valuable anaesthetic, a colourless liquid, possessing an agreeable smell and a pleasant taste.
The free pararosaniline, C19H19N30, and rosaniline, C20H21N30, may be obtained by precipitating solutions of their salts with a caustic alkali, colourless precipitates being obtained, which crystallize from hot water in the form of needles or plates.
The ketones are of neutral reaction, the lower members of the series being colourless, volatile, pleasant-smelling liquids.
At the other extreme the cell-walls of many lichen-fungi are soft and colourless, but turn blue in iodine, as does starch.
But we may refer generally here to certain phenomena peculiar to these plants, the life-actions of which are restricted and specialized by their peculiar dependence on organic supplies of carbon and nitrogen, so that most fungi resemble the colourless cells of higher plants in their nutrition.
It is a colourless solid, which melts at 80° C., and boils at 218° C. It crystallizes in the monoclinic system; it is to be noted that aand 0-naphthol assume almost identical forms, so that these three compounds have been called isomorphous.
It forms colourless needles which melt at 94° C.; and is readily soluble in alcohol, ether, chloroform, and caustic alkalis.
They are colourless crystalline solids which turn brown on exposure.
Potassium benzene diazotate, C 6 H 5 N 2 OK, crystallizes in colourless silky needles.
Phenyl nitramine, C 6 H S NH N02, is a colourless crystalline solid, which melts at 46° C. Sodium amalgam in alkaline solution reduces it to phenylhydrazine.
This salt is a colourless crystalline substance of composition CH30 C6H4 N2 CN HCN 2H20, and has the properties of a metallic salt; it is very soluble in water and its solution is an electrolyte, whereas the solutions of the synand anticompounds are not electrolytes.
Pure hydrogen is a tasteless, colourless and odourless gas of specific gravity 0.06947 (air= i) (Lord Rayleigh, Proc. Roy.
The solid variety prepared by Staedel forms colourless, prismatic crystals which melt at -2° C.; it is decomposed with explosive violence by platinum sponge, and traces of manganese dioxide.
It is a colourless highly volatile and inflammable liquid, having at 20° C. a specific gravity of 0.65.
The esters of the aliphatic and aromatic acids are colourless neutral liquids, which are generally insoluble in water, but readily dissolve in alcohol and ether.
It is a colourless oily liquid of strongly acid reaction; its aqueous solution decomposes on standing and on heating it forms diethyl sulphate and sulphuric acid.
Dimethyl sulphate, (CH3)2S04, is a colourless liquid which boils at 187 °-188° C., with partial decomposition.
Ethyl nitrate, C2H5.0N02, is a colourless liquid which boils at 86.3° C. It is prepared by the action of nitric acid on ethyl alcohol (some urea being added to the nitric acid, in order to destroy any nitrous acid that might be produced in secondary reactions and which, if not removed, would cause explosive decomposition of the ethyl nitrate).
Absolutely colourless stones are not so common as cloudy and faintly coloured specimens; the usual tints are grey, brown, yellow or white; and as rarities, red, green, blue and black stones have been found.
Many large stones have been found in South Africa; some are yellow but some are as colourless as the best Indian or Brazilian stones.
In very succulent plants the cells form a compact mass, and those in the centre are often colourless.
Its hydrochloride melts at 163° C., and crystallizes from alcohol in colourless deliquescent prisms. Acetic anhydride converts the base into an acetamino-dimethyl pyrimidine, acetic acid and acetamide being also formed.
C: (NH) NH 2, forms colourless crystals which melt at 75-80° C. When warmed it breaks down into ammonia and cyanphenine (s-triphenyl triazine).
It crystallizes in large colourless plates which possess a blue fluorescence.
When chemically pure, which is rarely the case, blende is colourless and transparent; usually, however, the mineral is yellow, brown or black, and often opaque, the depth of colour and degree of transparency depending on the amount of iron present.
By evaporation of a solution of lanthanum oxide in hydrochloric acid to the consistency of a syrup, and allowing the solution to stand, large colourless crystals of a hydrated chloride of the composition 2LaC1 3.15H 2 O are obtained.
It is a colourless liquid, with a faint aromatic smell, and boils at 206° C. On oxidation with nitric acid it is converted into benzaldehyde, whilst chromic acid oxidizes it to benzoic acid.
By crystallization from alcohol it is obtained as colourless needles, melting at 115°.
Rock-salt when pure is colourless and transparent, but is usually red or brown by mechanical admixture with ferric oxide or hydroxide.
Sometimes, to get rid of these impurities, the brine is treated in a large tub-`(bessoir) with lime; on settling it becomes clear and colourless, but the dissolved lime forms a skin on its surface in the pan, retards the evaporation and impedes the crystallization.
Certain species, such as Gymnodinium spirale, are colourless and therefore saprophytic in their method of nutrition.
These are for the most part long, thin-walled, unicellular and colourless, and arise from the outer cells of the pseudo-cortex, or from the terminal cells of branches when the filaments are free.
The colourless granules of Florideae, which are supposed to constitute the carbohydrate reserve material, have been called floridean-starch.
The somewhat colourless compromise doubtless proceeded from the party of Eusebius of Nicomedia, and proved not inacceptable to the more nearly orthodox members of the synod.
Thallic chloride, T1C1 3, is obtained by treating the monochloride with chlorine under water; evaporation in a vacuum gives colourless deliquescent crystals of T1C1,.H20.
Thallic sulphate, T1 2 (SO 4) 3.7H 2 O, and thallic nitrate, Tl(NO 3) 3.8H 2 0, are obtained as colourless crystals on the evaporation of a solution of the oxide in the corresponding acid.
It is a colourless liquid of very unpleasant smell, which boils at 198° C., and solidifies in a freezing mixture, the crystals obtained melting at -1° C. It shows all the characteristic properties of an acid chloride.
It is a colourless liquid of boiling point 213° C.
Oxygen is a colourless, odourless and tasteless gas.
Manganous Nitrate, Mn(NO 3) 2.6H 2 0, obtained by dissolving the carbonate in nitric acid and concentrating the solution, crystallizes from nitric acid solutions in long colourless needles, which melt at 25.8° C. and boil at 129.5° C. with some decomposition.
In his characterizations of persons, borrowed from Socrates, he is more dull and colourless.
Whatever its origin, the word Mass had by the time of the Reformation been long applied only to the Eucharist; and, though in itself a perfectly colourless term, and used as such during the earlier stages of the 16th century controversies concerning the Eucharist, it soon became identified with that sacrificial aspect of the sacrament of the altar which it was the chief object of the Reformers to overthrow.
Clearly the word Mass had ceased to be a colourless term generally applicable to the eucharistic service; it was, in fact, not only proscribed officially, but in the common language of English people it passed entirely out of use except in the sense in which it is defined in Johnson's Dictionary, i.e.
It is a colourless crystalline solid, readily soluble in water and alcohol; it deliquesces on exposure to air.
It is a colourless substance, which is easily fusible.
Cerium compounds may be recognized by the red precipitate of ceric hydroxide, which is formed when sodium hypochlorite is added to a colourless cerous salt.
The anthelia (from the Greek duet, opposite, and i Xcos, the sun) are coloured red on the inside, the outside being generally colourless owing to the continued overlapping of many spectra.
This is at first colourless carbon dioxide, but later on inflammable gases come out of the mass, which at this stage has turned into a thicker, pasty condition, showing that the end of the reaction is near.
The salts of scandium are all colourless, the chloride and bromide corresponding in composition to Sc 2 X 6.12H 2 0; the fluoride is anhydrous.
Gallium forms colourless salts, which in neutral dilute aqueous solutions are converted on heating into basic salts.
Gillmeister, Ber., 18 97, 3 o, P 28 44) It forms colourless crystals which melt at 116.5° C. and boil at 319° C. (773 mm.).
It forms practically colourless needles which melt at 89.7° C., and boil at 302.8° C. It is used for the preparation of meta-phenylene diamine.
It crystallizes in colourless needles, which melt at 171°-172° C. It is only slightly soluble in cold water and cold alcohol.
In the solid state triphenyl is colourless, crystalline and bimolecular.
Evaporation of a solution at ordinary temperatures gives colourless monoclinic prisms of Th(SO 4) 2.9H 2 O, which is isomorphous with uranium sulphate, U(S04)2.9H20.
Nickel carbonyl, Ni(CO) 4, is obtained as a colourless mobile liquid by passing carbon monoxide over reduced nickel at a temperature of about 60° C. (L.
The rubidium salts are generally colourless, mostly soluble in water and isomorphous with the corresponding potassium salts.
Rubidium hydride, RbH, was obtained in the form of colourless needles by H.
Rubidium hydroxide, RbOH, is a colourless solid which is formed by the action of rubidium on water, or by the addition of baryta water to a solution of rubidium sulphate.
It crystallizes in colourless cubes and volatilizes when heated very strongly.
It forms large colourless hexagonal crystals.
The normal sulphide, Rb 2 S 4H 2 O, is colourless, and when heated in aqueous solution with the requisite amount of sulphur is transformed into the yellow tetrasulphide, Rb 2 S 4.2H 2 O.
When heated in a current of hydrogen it is transformed into the colourless disulphide, whilst if the heating be carried out in a current of nitrogen it yields the trisulphide, Rb 2 S 3 H 2 0.
It is a colourless liquid with a sweetish burning taste and an agreeable odour.
They afford 60% of a colourless or pale-yellow, sweettasting, non-drying oil, which has a specific gravity of 0.92 nearly, becomes solid at - 19° C. (Cloez), and consists approximately of carbon 77, and hydrogen and oxygen each 11.5%.
In India, in Behar, during August there is a colourless festival in which women, " wives of the snake," go round begging on behalf of the Brahmans and the villages (Crooke ii.
The hydrides of the halogens are all colourless, strongly fuming gases, readily soluble in water and possessing a strong acid reaction; they react readily with basic oxides, forming in most cases well defined crystalline salts which resemble one another very strongly.
The solution of chlorine in water, when freshly prepared, possesses a yellow colour, but on keeping becomes colourless, on account of its decomposition into hydrochloric acid and oxygen.
Not that there is any evidence of Buddhists ever having been actually persecuted by the Brahmans, or still less of Sankara himself ever having done so; but the traditional belief in some personal god, as the principal representative of an invisible, all-pervading deity, would doubtless appeal more directly to the minds and hearts of the people than the colourless ethical system promulgated by the Sakya saint.
As water for respiration streams through the clefts, gaseous interchange takes place between the circulating colourless blood and the percolating water.
It crystallizes in colourless plates and is readily soluble in alcohol, ether, &c., but not in water.
Succinyl chloride, obtained by the action of phosphorus pentachloride on succinic acid, is a colourless liquid which boils at 190° C. In many respects it behaves as though it were dichlorbutyro-lactone, /CC12 C 2 He >O; e.g.
It crystallizes in colourless octahedra which melt at 125-126° C., and is easily soluble in water.
The colour in the case of red wines is first altered from red to brown, and in bad cases disappears altogether, leaving an almost colourless solution.
All three terms are now in use, "nonconformist" being the most usual, as it is the most colourless.
"Pale," in the sense of colourless, whitish, of a shade of colour lighter than the normal, is derived through O.
Geuther, who showed that the chief product of the action of sodium on ethyl acetate was a sodium compound of composition C6H903Na, which on treatment with acids gave a colourless, somewhat oily liquid of composition C6H1003.
Aceto-acetic ester is a colourless liquid boiling at 181°C.; it is slightly soluble in water, and when distilled undergoes some decomposition forming dehydracetic acid C 8 H 8 0 4.
It dissolves in ammonia, forming a colourless solution which rapidly oxidizes and turns blue.
Its solution in ammonia is at first colourless, but rapidly turns blue, owing to oxidation.
The aldo-ketenes are colourless compounds which are not capable of autoxidation, are polymerized by pyridine or quinoline, and are inert towards compounds containing the groupings C :N and C :O.
On standing for some time a brown-coloured liquid is obtained, from which a colourless liquid boiling at 126-127° C., has been isolated (Wilsmore, ibid., 1908, 93, p. 94 6).
When pure the acid forms a colourless, amorphous mass, very soluble in water, less so in alcohol, and practically insoluble in ether.
PARALDEHYDE, in medicine, a clear colourless liquid (for the chemistry see Aldehydes), soluble in i in 10 of water and freely in alcohol.
A saturated solution of the hydroxide deposits on cooling a hydrated form Ba(OH) 2.8H 2 0, as colourless quadratic prisms, which on exposure to air lose seven molecules of water of crystallization.
The chloride crystallizes in colourless rhombic tables of specific gravity 3.9 and is readily soluble in water, but is almost insoluble in concentrated hydrochloric acid and in absolute alcohol.
His very biographies are colourless.
The fungus is very small in size, and under the microscope appears slightly whitish or colourless.
It is a poisonous colourless gas, with a characteristic offensive smell.
Kopp) to a colourless oil; and boils at 223° (H.
It is a nearly colourless fuming liquid of unpleasant smell, which can be solidified to a mass of crystals melting at-6° C. It dissociates into the trichloride and chlorine when heated.
It is a colourless liquid, slightly soluble in water, and is spontaneously inflammable.
All the known forms of plant-life are either fungi or allied to them, and many are only microscopic. The most interesting inhabitants of Mammoth Cave are the blind, wingless grasshoppers, with extremely long antennae; blind, colourless crayfish (Cambarus pellucidus, Telk.); and the blind fish, Amblyopsis spelaeus, colourless and viviparous, from 1 in.
It crystallizes in colourless plates, possessing a violet fluorescence, melting at 112-113° and boiling at 293-295° C. By oxidation with chromic acid in glacial acetic acid solution, it is converted into diphenylene ketone (C8H4)2 CO; whilst on heating with hydriodic acid and phosphorus to 250-260° C. it gives a hydro derivative of composition C13H22.
Nearly all bacteria, owing to the absence of chlorophyll, are saprophytic or parasitic forms. Most of them are colourless, but FIG.
broad according to Zopf), highly refractive and colourless (or very dark, probably owing to the high index of refraction and minute size).
rays not appearing in the visible spectrum - are absorbed and employed by these and other colourless bacteria.
In consequence of its low refractive and dispersive power, colourless pellucid fluor-spar is valuable in the construction of apochromatic lenses, but this variety is rare.
It crystallizes from benzene in colourless needles which melt at 119° C. and boil at 276.5° C. (L.
The oxide, Yb203, is white and forms colourless salts; the crystallized chloride, YbC1 3.6H 2 0, forms colourless, deliquescent crystals; the anhydrous chloride sublimes on heating (C. Matignon, Ann.
As the solution of potassium permanganate, which is deep red in colour, is dropped into the colourless iron solution, it is quickly decolorized while the iron solution gradually assumes a yellowish tinge, the first drop of the permanganate solution in excess giving it a pink tint.
Acetone is a colourless mobile liquid of pleasant smell, boiling at 56.53°C., and has a specific gravity 0.819 (0 deg.
Silver nitrate, AgNO 3, one of the most important silver salts, is obtained by dissolving the metal in moderately dilute nitric acid; on evaporation it separates in the anhydrous form as colourless triclinic plates.
Pyridine is a colourless liquid of a distinctly unpleasant, penetrating odour.
Thymol crystallizes in large colourless plates, which melt at 44° and boil at 230°.
Oleic acid is a colourless, odourless solid, melting at 14° and boiling at 223° (Io mm.).
It is a colourless gas which possesses a characteristic smell, more unpleasant than sulphuretted hydrogen.
It crystallizes in colourless needles.
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.
It occurs in a colourless crystalline powder, having the formula C20H24N202.2HC1.3H20.
The solution is of an orange-red colour, and is quite permanent in the dark, but on exposure to light, gradually becomes colourless, owing to decomposition into hydrobromic acid and oxygen.
At ordinary temperatures hydrobromic acid is a colourless gas which fumes strongly in moist air, and has an acid taste and reaction.
It can be condensed to a liquid, which boils at - 64.9°C. (under a pressure of 738.2 mm.), and, by still further cooling, gives colourless crystals which melt at - 88.5° C. It is readily soluble in water, forming the aqueous acid, which when saturated at 0° C. has a specific gravity of 1.78.
It forms a colourless syrup, of specific gravity 1.2485 (1 5°/4°), and decomposes on distillation under ordinary atmospheric pressure; but at very low pressures (about i mm.) it distils at about 85° C., and then sets to a crystalline solid, which melts at about 18° C. It possesses the properties both of an acid and of an alcohol.
It is infusible before the gas blowpipe, but in the oxyhydrogen flame fuses to a clear colourless glass, which has a hardness of 5 and specific gravity 2.2.
Further, these varieties may be of almost any colour, whereas transparent crystals have only a limited range of colour, being either colourless (rock-crystal), violet (amethyst), brown (smoky quartz) or yellow (citrine).
It remains colourless in vacuum tubes in the dark, but on exposure it rapidly turns yellow.
It boils at 290°, forming a colourless vapour which just about the boiling-point corresponds in density to tetratomic molecules, P4; at 1500° to 1700°, however, Biltz and Meyer detected dissociation into P2 molecules.
It is a colourless, extremely poisonous gas, possessing a characteristic offensive smell, resembling that of rotting fish.
It is a colourless liquid which boils at 57°-58° C. It is insoluble in water, but soluble in alcohol and ether.
It crystallizes in colourless cubes, is deliquescent, and often inflames spontaneously on exposure to air.
The primary and secondary phosphines are colourless compounds, and with the exception of methyl phosphine are liquid at ordinary temperature.
The boiling-points of some members of the series are shown in the table: The alkyl phosphinic acids are colourless crystalline compounds which are easily soluble in water and alcohol.
The dialkyl phosphinic acids are also colourless compounds, the majority of which are insoluble in water.
It forms crystals, apparently monoclinic, which melt at 22.5° to a clear, colourless, mobile liquid of boiling-point 173-i°.
It is a colourless, non-fuming gas, which gives a colourless, mobile liquid at -10° and 20 atmospheres; the liquid boils at -95° and solidifies at -160° (Moissan, Comptes rendus, 1904, 138, p. 789).
It is a colourless gas 42 times heavier than air, and liquefies at 15° under 40 atmospheres, solidifying when the pressure is diminished.
It is a colourless fuming gas, which liquefies under ordinary pressure at -50°, and under a pressure of 15 atmospheres at 16°; it may be solidified to a snow-like mass.
The corresponding sulphur compound, thiophosphoryl fluoride, PSF 3, obtained by heating lead fluoride and phosphorus pentasulphide to 200°, is a colourless gas, which may be condensed to a clear transparent liquid.
It is a colourless, mobile liquid of specific gravity 1.6128 at o° and boiling-point 76°.
Fournier (Comptes rendus, 1901, 150, p. 102) obtained phosphorus dichloride, P2C14, as a colourless, oily, strongly fuming liquid, freezing at -28° and boiling at 180° with decomposition.
It is a colourless liquid,boiling at 107.2°, and when solidified it melts at o 8°.
Pyrophosphoryl chloride, P 2 0 3 C1 4, corresponding to pyrophosphoric acid, was obtained by Geuther and Michaelis (Ber., 1871, 4, P. 766) in the oxidation of phosphorus trichloride with nitrogen peroxide at low temperature; it is a colourless fuming liquid which boils at about 212° with some decomposition.
It is a colourless mobile liquid, boiling at 125-1° and having a pungent, slightly aromatic odour.
Ortho-xylene is obtained from ortho-bromtoluene, methyl iodide and sodium as a colourless mobile liquid boiling at 142°, melting at - 28°, and having a specific gravity of 0.8932 at o°.
It is a colourless oily liquid of specific gravity o 845 0 boiling at 166° C., almost insoluble in water, soluble in ether and in alcohol.
With the help of counsellors more subtle than discerning, the emperor, with the object of uniting the various parties in the Church at any cost, sought for the most colourless possible formula of belief, which he hoped to persuade all the bishops to accept.
Quinoline is a colourless liquid with a smell resembling that of pyridine.
It is a colourless liquid which boils at 247° C. The -CH 3 group is very reactive, condensing readily with aldehydes and with phthalic anhydride.
It is a colourless liquid which boils at 255° C. Chromic acid oxidizes it to cinchoninic acid (see below), whilst potassium permanganate oxidizes it to lepidinic acid (y-methylquinolinic acid) and cinchomeronic acid (see Pyridine).
Pure sulphuric acid, H 2 SO 4, is a colourless, odourless liquid of an oily consistency, and having a specific gravity of 1.8384 at 15°.
It freezes to a colourless crystalline mass, melting at 10 5°.
- Sulphuric acid or oil of vitriol is a colourless oilylooking liquid incompatible with alkalis and their carbonates, lead and calcium.
It consists of colourless granular crystals freely soluble in water and having an alkaline reaction.
It is a colourless oil, moderately soluble in water.
It is a colourless liquid which boils at 11 -12° C., and its vapour burns with a luminous flame.
It is a colourless liquid which boils at 50-51° C. Methyl-cyclo-pentane, C 5 H 9 CH 3, first obtained by F.
It is a colourless liquid which boils at 180° C.
, 27, p. 39 2), crystallizes in colourless prisms which melt at 234° C. When heated in vacuo to 240° C. it yields hydroquinone, quinone and pyrogallol.
It is a colourless liquid, possessing a peppermint odour and boiling at 155° C. Nitric acid oxidizes it to adipic acid.
C 6 H 11 SH, a colourless oil which boils at 158-160° C. (W.
It crystallizes in colourless prisms and is optically active.
It is a colourless liquid having a peppermint odour, and boiling at 178.5-179.5° C. Nitric acid oxidizes it to n-pimelic acid.
The tetramethyl derivative, amalic acid, C$(CH3)4N407, has been prepared by oxidizing caffeine with chlorine water, and forms colourless crystals which are only slightly soluble in hot water.
Red ferric hydroxide dissolves in acids to form a well-defined series of salts, the ferric salts, also obtained by oxidizing ferrous salts; they are usually colourless when anhydrous, but yellow or brown when hydrated.
Ferrous fluoride, FeF21 is obtained as colourless prisms (with 8H2O) by dissolving iron in hydrofluoric acid, or as anhydrous colourless rhombic prisms by heating iron or ferric chloride in dry hydrofluoric acid gas.
Ferric fluoride, FeF 31 is obtained as colourless crystals (with 42H2O) by evaporating a solution of the hydroxide in hydrofluoric acid.
Iron dissolves in a solution of sulphur dioxide in the absence of air to form ferrous sulphite and thiosulphate; the former, being less soluble than the latter, separates out as colourless or greenish crystals on standing.
Ferric sulphate, Fe2(S04)3, is obtained by adding nitric acid to a hot solution of ferrous sulphate containing sulphuric acid, colourless crystals being deposited on evaporating the solution.
The free base is a colourless, odourless, crystalline solid, melting at about 30 C., and boiling at 58° C. (under a pressure of 22 mm.).
It forms a colourless mobile liquid, boiling at I10.3° C. and having a specific gravity of 0.8708 (13.1/4°).
Oil of turpentine is a colourless liquid of oily consistence, with a strong characteristic odour and a hot disagreeable taste.
Rosin varies in colour, according to the age of the tree whence the turpentine is drawn and the amount of heat applied in distillation, from an opaque almost pitchy black substance through grades of brown and yellow to an almost perfectly transparent colourless glassy mass.
The lower members are colourless mobile liquids, readily soluble in water and exhibiting a characteristic odour and taste.
CHO =C3H50H+C02+H20 It is a colourless mobile liquid of pungent smell, boiling at 97° C. Being an unsaturated compound it combines readily with the halogens.
The metavanadates are usually yellowish or colourless solids.
Although his narrative is colourless, and although he was one of those who showed some sympathy for Becket at the council of Northampton (1164),(1164), the correspondence of Diceto shows that he regarded the archbishop's conduct as ill-considered, and that he gave advice to those whom Becket regarded as his chief enemies.
The oxide Gd203 is colourless (Lecoq de Boisbaudran).
It is a colourless gas of unpleasant smell, excessively poisonous, very slightly soluble in water.
Arsenic tribromide, AsBr3, is formed by the direct union of arsenic and bromine, and subsequent distillation from the excess of arsenic; it forms colourless deliquescent prisms which melt at 20 0 -25° C., and boil at 220° C. Water decomposes it, a small quantity of water leading to the formation of the oxybromide, AsOBr, whilst a large excess of water gives arsenious oxide, As4O6.
Arsenic trichloride, AsCl3, is prepared by distilling white arsenic with concentrated sulphuric acid and common salt, or by the direct union of arsenic with chlorine, or from the action of phosphorus pentachloride on white arsenic. It is a colourless oily heavy liquid of specific gravity 2.205 (o° C.), which, when pure and free from chlorine, solidifies at - 18°C., and boils at 132 °C. It is very poisonous and decomposes in moist air with evolution of white fumes.
With a little water it forms arsenic oxychloride, AsOCl, and with excess of water it is completely decomposed into hydrochloric acid and white arsenic. It combines directly with ammonia to form a solid compound variously given as AsCl3.3NH3 or 2AsCl3.7NH3, or AsCl3.4NH3 Arsenic trifluoride, AsF3, is prepared by distilling white arsenic with fluorspar and sulphuric acid, or by heating arsenic tribromide with ammonium fluoride; it is a colourless liquid of specific gravity 2.73, boiling at 63° C; it fumes in air, and in contact with the skin produces painful wounds.
On distillation of equal parts of dry potassium acetate and arsenious oxide, a colourless liquid of unbearable smell passes over, which is spontaneously inflammable and excessively poisonous.
It is a colourless crystalline substance, assuming forms belonging to the hexagonal system, and distinguished by a well-marked habit of twinning, which occasions the beautiful "ice flowers" displayed by hoar-frost.
In general a stream of plane-polarized light undergoes no change in traversing a plate of an uniaxal crystal in the direction of its axis, and when the emergent stream is analysed, the light, if originally white, is found to be colourless and to be extinguished when the polarizer and analyser are crossed.
It is a colourless liquid having a faint smell resembling that of benzene and boiling at 84° C. In its chief properties it very much resembles benzene, being readily brominated, sulphonated, and nitrated; also, the side chains in the alkyl thiophens are readily oxidized to carboxyl groups.
They are almost colourless at birth, excepting the antennae, which are green, and their length is To to 15 mm.
It crystallizes in colourless prisms with one molecule of water, which redden on exposure.
They are colourless liquids, which are insoluble in water and possess a characteristic offensive smell.
Ethyl mercaptan, C 2 H 5 .SH, is a colourless liquid which boils at 36.2° C. It is used commercially in the preparation of sulphonal.
blue, and thus magnify the red image more than the blue; and as the objective gives a large blue and a small red image, the two cancel one another and a colourless image is produced.
Too much light is useless for observing delicately coloured or colourless preparations, whose parts only become visible as a result of slight differences of diffraction.
Pure aniline is a basic substance of an oily consistence, colourless, melting at - 8° and boiling at 184° C. On exposure to air it absorbs oxygen and resinifies, becoming deep brown in colour; it ignites readily, burning with a large smoky flame.
Aniline hydrochloride forms large colourless tables, which become greenish on exposure; it is the "aniline salt" of commerce.
Monomethyl and dimethyl aniline are colourless liquids prepared by heating aniline, aniline hydrochloride and methyl alcohol in an autoclave at 220°.
There is little description in his novels, which sometimes seem to move on an almost bare and colourless stage, but, on the other hand, the analysis of motives, of emotions, and of "the fine shades" has rarely been carried further.
It is colourless, or of different colours.
Nutrition is of course holozoic or saprophytic in the colourless forms, holophytic in the coloured; but these divergent methods are exhibited by different species of the same genus, or even by individuals of one and the same species under different conditions.
The affinities of the Dinoflagellata are certainly with those Cryptomonadine Flagellates which possess two unequal flagella; the zoospores or young of the Cystoflagellates are practically colourless Dinoflagellates.
It has an amorphous internal structure, a dull fracture; is of a yellow to yellowish-brown hue, the purer varieties being almost colourless, or possessing a greenish tinge, and has a somewhat bitter aromatic taste, and a balsamic odour, which is developed by heating.
It contains about 72% of resin soluble in alcohol (Kurbatow); a large proportion of gum soluble in water, and apparently identical with gum arabic; and a small quantity of a colourless inflammable essential oil, one of the constituents of which is the body oliben, C,0H16.
Those which act on the skin: The best known of these is cantharides (Spanish fly), the active principle of which is a colourless crystalline body - cantharidin - which is extremely irritating.
When solutions of gum arabic and gelatin are mixed, oily drops of a compound of the two are precipitated, which on standing form a nearly colourless jelly, melting at 25° C., or by the heat of the hand.
Even here then the use of the word is not colourless.
The pure acid may be obtained by fractional distillation as a colourless liquid of very unpleasant smell, boiling at 30° C., and extremely explosive.
Raschig (Be y ., 1908, 4 1, p. 4 1 94) as a highly explosive colourless gas on acidifying a mixture of sodium azide and hypochlorite with acetic or boric acid.
After some time the colour entirely disappeared; the strip of copper was then taken out and reweighed, and it was found to have lost 8.03 grams. Thus the chlorine, which in the coloured compound was in union with 8 grams of copper, appears, in the colourless chloride, to be combined with 16.03 grams, or almost exactly double the amount.
From its aqueous solution, concentrated hydrochloric acid precipitates hydrocobalticyanic acid, H 3 Co(CN) 61 as a colourless solid which is very deliquescent, and is not attacked by concentrated hydrochloric and nitric acids.
Uracil and its homologues may be obtained in many cases from the hydrouracils by the action of bromine, and subsequent elimination of the elements of hydrobromic acid; or by the condensation of aceto-acetic ester and related substances with urea, thiourea, guanidine, &c. Uracil, C4H402N2, crystallizes in colourless needles, is soluble in hot water and melts with decomposition at 335Ã‚° C. Hydrouracil, C4H602N2, is obtained by the action of bromine and caustic alkalis on succinamide (H.
When unaltered and containing no ferric oxide, the mineral is colourless, but on exposure to the light it very soon becomes of a characteristic indigo-blue colour.
It burns with a purple flame, forming carbon dioxide and nitrogen; and may be condensed (by cooling to - 25Ã‚° C.) to a colourless liquid, and further to a solid, which melts at - 34.4Ã‚° C. (M.
It is a colourless fuming liquid boiling at 17-18Ã‚° C., and is readily decomposed by water with formation of boric and hydrochloric acids.
It is a colourless fuming liquid boiling at 90.5Ã‚° C. With water and with ammonia it undergoes the same reactions as the chloride.
These are colourless liquids boiling at 119Ã‚° C. and 72Ã‚° C. respectively, and both are readily decomposed by water.
It is a colourless spontaneously inflammable liquid of boiling point 95Ã‚° C. By the action of one molecule of ethyl borate on two molecules of zinc ethyl, the compound B(C2H5)2.002H5 diethylboron ethoxide is obtained as a colourless liquid boiling at 102Ã‚° C. By the action of water it is converted into B(C2H5)2.
(0C2H5)5 is obtained as a colourless liquid of boiling point 112Ã‚° C. Boron triethyl and boron trimethyl both combine with ammonia.
It is a colourless oil, which boils at 247Ã‚° C. (745 mm.), and when pure is almost odourless.
Nicotimine is a colourless liquid which boils at 250 0 -255Ã‚° C. Its aqueous solution is alkaline.
It yields colourless salts; the crystallized sulphate has the formula Tb2(S04)3.8H20.
It is a colourless pleasant-smelling liquid which boils at 154.3Ã‚° C. Phenetol, phenyl ethyl ether, C 6 H 5.
O Coch 3, a colourless liquid of boiling point 193Ã‚° C., may be prepared by heating phenol with acetamide.
OH N02(1.4), crystallizes in long colourless needles which melt at 114Ã‚°C. Meta-nitrophenol, C6H4.OH N02 (1.3), is prepared from meta-nitraniline by diazotizing the base and boiling the resulting diazonium salt with water.
It is a colourless liquid, which possesses a very disagreeable smell, and boils at 168Ã‚° C.
By heating the metal with chlorine, germanic chloride, GeCl4, is obtained as a colourless fuming liquid boiling at 86-87Ã‚° C., it is decomposed by water forming a hydrated germanium dioxide.
It is a colourless, highly refracting liquid, boiling at 78Ã‚°; it fumes on exposure to moist air.
1 3 2, p. 374), is an exceedingly stable colourless gas at ordinary temperatures, becoming solid at about -120Ã‚° C. Sulphuryl chloride, SO 2 C1 2, first obtained in 1838 by Regnault (Ann.
OH =S02C12+ H 2 SO It is a colourless fuming liquid which boils at 69Ã‚° C. and which is readily decomposed by water into sulphuric and hydrochloric acids.
It is a colourless fuming liquid which boils at 152-153Ã‚° C. When heated under pressure it decomposes, forming sulphuric acid, sulphuryl chloride, &c. (Ruff, Ber., 1901, 34, p. 35 0 9).
Crystals of barytes may be transparent and colourless, or white and opaque, or of a yellow, brown, bluish or greenish 'colour.
It is a colourless liquid boiling at 197Ã‚° 7 -198Ã‚° 2 C. (W.
It is colourless and contains definite corpuscles, which are round or elliptical, and in many Metanemertines are coloured red by haemoglobin, being colourless in other species.
When perfectly pure, carbon bisulphide is a colourless, somewhat pleasant smelling, highly refractive liquid, of specific gravity 1 2661 (18Ã‚°/4Ã‚°) (J.
If the hot colourless bead becomes enamel-white on cooling even when minute quantities of the substances are employed, we may infer the presence of barium or strontium.
It is a feebly basic, colourless liquid which boils at 130Ã‚° C., and possesses a smell resembling that of chloroform.
Salicylic acid crystallizes in small colourless needles which melt at 1 55Ã‚° C. It is sparingly soluble in cold water, but readily dissolves in hot.
Normal butyl alcohol, CH 3 (CH 2) 2 CH 2 OH, is a colourless liquid, boiling at 116.8Ã‚°, and formed by reducing normal butyl aldehyde with sodium, or by a peculiar fermentation of glycerin, brought about by a schizomycete.
Priestley, who obtained it by reducing nitrogen peroxide with iron, may be prepared by heating ammonium nitrate at 170-260Ã‚° C., or by reducing a mixture of nitric and sulphuric acid with zinc. It is a colourless gas, which is practically odourless, but possesses a sweetish taste.
At low temperatures it is a colourless crystalline solid which melts at -10.14Ã‚° C. (W.
The liquid boils at about 22Ã‚° C. This change of colour is accompanied by a change in the vapour density, and is explained by the fact that nitrogen peroxide consists of a mixture of a colourless compound N204, and a redbrown gas N02, the latter increasing in amount at the expense of the former as the temperature is raised (G.
It crystallizes in colourless plates melting at 20Ã‚°C. and boiling at 202Ã‚°C.; it is insoluble in water, but readily dissolves in the ordinary organic solvents.
The colourless or amber-coloured filtrate is concentrated to 27Ã‚° to 28Ã‚° B., when it forms the "heavy liquor," just mentioned.
It crystallizes in colourless plates or needles, which melt at 99Ã‚° C. Its solutions in alcohol and ether have a faint blue fluorescence.
It is prepared by oxidizing ethyl alcohol with dilute sulphuric acid and potassium bichromate, and is a colourless liquid of boiling point 20Ã¯¿½8Ã‚° C., possessing a peculiar characteristic smell.
It is a colourless liquid of specific gravity oÃ¯¿½8314 (20Ã‚°/4Ã‚°) (J.
Salicylic aldehyde (ortho-hydroxybenzaldehyde), HO(I)Ã¯¿½ C 6 H 4 Ã¯¿½CHO(2), an aromatic oxyaldehyde, is a colourless liquid of boiling point 196Ã‚° C. and specific gravity.
It is a colourless aromatic-smelling oily liquid, which boils at 247Ã‚° C. and readily oxidizes on exposure.
Nitromethane, CH 3 NO 2, is a colourless oil which boils at 101Ã‚° C. Fuming sulphuric acid decomposes it into carbon monoxide and hydroxylamine.
Nitroethane, C2H5N02, is a colourless liquid which boils at 114Ã‚° C. Nitroform (trinitromethane), CH(N03)3, is obtained in the form of its ammonium salt by the decomposition of trinitroacetonitrile with water (L.
It is a colourless crystalline solid which melts at 15Ã‚° C. and has the properties of a strong acid.
It is a colourless oily liquid which boils at 225Ã‚°-227Ã‚° C., is somewhat soluble in water, and does not give a coloration with ferric chloride.