The Chemical Gazette, Band 161858 |
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acetic acid action æther alcohol aldehyde alkaline alkaloids ammonia analysis antimony appears aqueous arsenic baryta body boiling boiling-point boron bromine carbonic acid cent cerium chemical chloride chloride of barium cinchonine colour colourless composition compound concentrated contains converted copper crystalline crystals decomposed decomposition dilute dissolved distillation dried employed equivalent equivs ethyle evaporated excess experiments fermentation filtered filtration fluid formed formula furnishes fused gave heated hydrate hydrocarbon hydrochloric hydrogen insoluble iodide iodine iron lactic latter lime liquid manganese mass mercury metal mixed mixture muriatic acid nitrate nitric acid nitrogen obtained odour oxalate oxalic acid oxide oxygen perchloride peroxide phosphorus piperine platinum potash potassium powder precipitate prepared produced protochloride pure quinidine quinine radical reaction readily residue salt separated silicium silver small quantity soda sodium soluble in water solution substance sugar sulphuretted hydrogen sulphuric acid temperature tion tube vapour washed whilst yellow
Beliebte Passagen
Seite 404 - It had been found that the leguminous crops, which yielded in their produce such a comparatively large amount of nitrogen over a given area of land, were not specially benefited by the direct application of the more purely nitrogenous manures. The cereal crops, on the other hand, whose acreage yield of nitrogen under equal circumstances was comparatively so small, were very much increased by the use of direct nitrogenous manures. But it was found that, over a series of years, only about four-tenths...
Seite 52 - By photographic printing ; troughs containing these solutions obstructed the chemical rays very considerably, thus interfering with the production of a positive picture from the negative, much longer exposure being necessary to produce any chemical effect. III. That certain reagents do not destroy fluorescence ; others only mask its appearance by their own colour ; whilst some destroy it by neutralizing the excess of acid ; others do so by producing salts which are themselves non-fluorescent media....
Seite 65 - The chemical characters of all these iodo-salts furnish no means of discrimination, for as a class they all agree in being more or less soluble in spirit, giving a deep sherry-brown solution, from which water precipitates them in an amorphous form, as dark brown, cinnamon-brown or purplish-brown coloured precipitates ; they are only very slightly soluble in dilute spirit, and scarcely at all in water, ether, turpentine, or chloroform : acetic, dilute sulphuric, or hydrochloric acid have but little...
Seite 346 - These investigations led to the following results : — 1 . A mixture of bile and neutral fats (stearine, oleine and margarine), heated to a temperature above the fusing-point of the fat, undergoes no change, and no chemical action takes place. 2. A mixture of bile and fatty acids (stearic, oleic, and margaric acids), heated to a temperature above the fusing-point of the fatty acids, is transformed into a solution, a very few and minute globules only of fat remaining unacted upon from the presence...
Seite 94 - The amount of water required to effect this change depends on the temperature. That the phenomena indicate some difference of arrangement among the elements of the dissolved salt and the water, cannot, I think, be doubted, but they fail to show in any distinct manner what that difference is. The action of water on double salts is a still more complicated problem ; but the question as to whether water separates the two components did not prove so difficult of decision. While on the one hand the physical...
Seite 265 - The frequently peculiar odour of fresh croton oil, which has the greatest similarity with the decoction of Senega root, is due to a product of decomposition of the crotonole. Another product of its decomposition is the volatile oil of previous observers. The caustic matter in croton oil, crotonole, has no purgative action ; the latter property belongs to another body which was not detected. With regard to crotonic acid, the author shows particularly that it forms a member of the oleic series lying...
Seite 150 - Carbon 31-58 3076 30-67 Hydrogen.. 10-52 12-82 12-97 Nitrogen .. 36-84 35-90 36-32 These numbers appear to me in favour of the formula which I propose for formylia ; there remains but little doubt that acetylia and propylia are analogously constituted. There remains yet to find the last term of the series, the tetrethylene-diammonium compound. Up to the present moment I have only established by experiment that the three lo'wer bases are powerfully attacked by bibromide of ethylene, a non-volatile...
Seite 52 - The test, however, is equally indicative of quinidine ; it gives scarcely any perceptible reaction with quinicine. VIII. Pelletier's chlorine gas-test succeeds very well with the free alkaloids, but does not show any indication with their salts. It is equally capable of detecting quinidine, and gives the same phenomena.
Seite 93 - That these changes of colour are due to the action of the water, and not to any merely physical cause, is proved by the fact that alcohol does not occasion them. Quantitative experiments were instituted with acetate of copper and sulphocyanide of iron, to determine whether the effect of successive additions of water is in a decreasing ratio. It was found to be so on the whole, but the results showed certain irregularities that do not usually occur in cases of reciprocal decomposition, where the mass...
Seite 54 - The specific gravity of the former is 6-55, whilst that of the latter is 5 -78, both being somewhat variable in this respect. The electro-chemical equivalent of the crystalline variety, after deducting a small portion of gas contained in it, is about 40-2 ; and of the amorphous kind, after deducting a much larger per-centage of gas and of chloride of antimony, which it always contains, the same ; but the equivalents actually obtained, including those substances, were 40- 7 for the crystalline and...