The Chemical Gazette, Or, Journal of Practical Chemistry, in All Its Applications to Pharmacy, Arts, and Manufactures, Volume 3

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R. and J.E. Taylor, 1845 - Chemistry
 

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Page 44 - ... or acetic acid. They have always found lactic acid, with a 'minute proportion of phosphoric acid, the latter being a product of the reaction of the lactic acid on the phosphates present In their opinion, lactic acid is a constant production of the stomach.
Page 336 - This communication was intended to explain the methods by which the author has succeeded in throwing down metallic alloys from compound solutions by the action of galvanic electricity. The process adopted, is to prepare a strong solution of cyanide of potassium, and commence electrolyzing it, by means of a copper anode; as soon as copper begins to be dissolved, the copper anode is removed, and its place supplied with one of zinc; after the action has continued for some little time, brass will be...
Page 334 - The velocity of air being !•, the velocity of oxygen was found to be -9500 by experiment, and by calculation -9487. Carbonic acid, being much heavier than air, gave the number -812. Carburetted hydrogen gave -1322 as the velocity of its effusion. Hydrogen gave as the velocity of effusion 3-613 by experiment, which was very nearly the amount given by theory. The interference of friction, even of minute orifices, was then described, and shown to admit of easy correction. Some useful applications...
Page 56 - Thilorier*s bath of solid carbonic acid and aether, placing it however under the recipient of an air-pump. By maintaining a constant vacuum, I lowered the temperature to such a degree, that the carbonic acid of the bath was not more volatile than water at the temperature of 86, for the barometer of the air-pump stood at 28-2 inches, the external barometer being at 29-4. This arrangement made, I joined together, by means of corks and stop-cocks, some small glass and copper tubes, so that with the...
Page 333 - By William Sharp, Esq., FRS The experiments recorded in this paper were undertaken principally with the ultimate view of ascertaining with exactness what quantity of inorganic matter is removed from the soil by the seeds of a crop of wheat. The author first inquires what is the average amount of the inorganic or incombustible portion of a given quantity of wheat ; a question to which no satisfactory answer has yet been given. The result of the author's experiments is, that wheat yields, by slow combustion,...
Page 307 - By Professor Daubeny, MD, FRS The author was first led to undertake the researches of which an account is given in the present memoir, by the expectation of verifying the theory of DeCandolle, in which the deterioration experienced by most crops on their repetition was attributed to the deleterious influence of their root-excretions.
Page 333 - The author found that this substance, by the further action of alkalies, became harder and less fusible than before, and not differing in chemical composition from the original substance, but exhibiting the properties of an organic salt-base. To this substance the author gives the name of benzoline.
Page 270 - Mi, potassa fritted 30, borax fritted 20, sulphuret of antimony 5, peroxide of manganese 5, fulminating gold rubbed in with oil of turpentine 5. If a little more fulminating gold is used a magnificent ruby. colour is obtained. Fulminating gold is obtained by precipitating the solution of gold in aqua regia by ammonia, and stirring the liquid for some time. The precipitate is then collected upon a filter, and washed rapidly with water boiled, and rendered slightly ammoniacal, then dried at a very...
Page 357 - ... inquiry, whether the value of some waters for irrigation may not depend upon their containing phosphoric acid, this constituent having been hitherto overlooked in waters.
Page 338 - ... sulphureous acid, which had been preserved in the liquid state by a freezing mixture, and some water, were poured into the vessel. The rapid evaporation of the volatile sulphureous acid, which enters into ebullition at the freezing point, produced such an intense degree of cold, that a large lump of ice was immediately formed, and being thrown out of the red-hot vessel, handed round to the company in the Section.

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