American Journal of Pharmacy and the Sciences Supporting Public Health, Volumen10Philadelphia College of Pharmacy and Science., 1839 |
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Términos y frases comunes
acetic action adulterations ammonia amygdaline antimony appears arsenic arsenious acid atoms bark becomes boiling camphor carbonate of iron carbonic acid cent characters chemical chlorine Codex cold color composition compound consistence contained crystals decomposed decomposition deposited dissolved drachm druggist drugs employed emulsine ether experiments extract fecula filtered flocculi fluid formula glass grains heat hydrated hydrochloric acid hydrogen inches insoluble iodide iodine IV.NO jalap Journ lime liquid liquor maceration matter medicine mercury mesitic mesitic alcohol mesitylene metallic mixed mixture morphine muriatic narcotine nitrate nitric acid observed obtained odor opium ounces oxide oxygen Pharmacie Pharmacopoeia pills plant portion potassa powder precipitate prepared present produced properties proportion protoxide pure quassia resin root salt saturated scammony separated sesquioxide small quantity soluble solution specific gravity strychnia substance sugar sulphate sulphuret sulphuric acid syrup taste temperature tincture tion tube vapors vessel volatile oil yellow
Pasajes populares
Página 302 - Immediately after its production, the carbonic snow begins to grow colder, and may be made to reach — 109° in the air, — 136° under an exhausted receiver. When moistened with ether, it can be depressed to — 146°. Professor Hare's ether acts much more effectually than sulphuric ether. At the immediately subsequent sitting of the Academy of Sciences, Thillorier announced the important fact that he had solidified carbonic acid. This he effected by suffering the liquid to escape into a bottle,...
Página 311 - ... condensation in the latter. This actually happened in the attempt to ascertain the pressure at 86°, when the natural temperature was 75°. Bubbles of gas were seen ascending through a liquid in M, up to its surface at a few inches below the mercurial cylinder. This as far as relates to the tubes may be avoided by prolonging the socket of M, down into the mercury of the cup, so as to include a cylinder of common air between two cylinders of mercury, and prevent any carbonic gas from entering...
Página 32 - Cinnamon is the most profitable of the vegetable productions of Ceylon, and yields a considerable revenue to the government, being for 1831, not less than 106,434, pounds sterling. Since 1832, however, several very important changes in the law relating to it have been made. Previous to that period, it was a monopoly in the hands of the East India Company, and its cultivation was saddled with many onerous restrictions. At present it is freely cultivated, and may be exported to any port in the world,...
Página 31 - ... varying in height from five to twenty feet. The form of the tree is conical ; the branches grow at nearly right angles with the trunk, and they begin to shoot a few inches above the ground.
Página 312 - The analogy between liquid carbonic acid and water, is thus completed for we have liquid, vapor, snow, and ice, exhibited by both. By the previous introduction of water, ether, alcohol, metals, oxides, or oils, &c. into such tubes, and then filling them with liquid carbonic acid, the resulting phenomena may be easily observed. Water being heavier rests below the new liquid, and does not appear to mingle with it even at the surface of contact, for when the latter is let off no bubbles appear in the...
Página 301 - Among the aerial fluids, carbonic acid was distinguished as requiring a force of 36 atmospheres at 32° F. to coerce it into the liquid state. His ingenious and hazardous experiments were conducted in glass tubes ; and he depended on the accumulation of newly generated gas for the necessary pressure.
Página 307 - About one drachm of solid matter is thus formed for each ounce of liquid. The porosity and volatile character of the solid renders its specific gravity of difficult ascertainment. When recently formed, it is about the weight of carbonate of magnesia; and when strongly compressed by the fingers, its density is nearly doubled. Solid carbonic acid is of a perfect whiteness, and of asoft and spongy texture, very like slightly moistened and aggregated snow.
Página 303 - G, the nozzle of a pipe, L, a glass level-gauge, and S, M, R, a pressure-gauge. The generator is 20 inches long and 6 inches in diameter exteriorly. Its cavity is 16 inches deep, and 3 inches, nearly, in diameter, so that it will hold about 4 pints. The walls are, of course, about 1£ inches in thickness.
Página 308 - ... exceed by means of any variation of the experiment. That result is most easily obtained by putting about two fluid drachms of ether into the iron receiver before charging it. A compound liquid may be thus formed which yields a snow in less quantity, but of a more facile refrigeration. Alcohol may replace ether in either mode, but with less decided effect. In the air the alcoholic mixture fell to — 105° and remained stationary.
Página 301 - ... of an inch in the thickness of their walls. This interesting subject was not again publicly agitated, until the appearance in December, 1835, of a report on the liquefaction of carbonic acid on a comparatively large scale. In the last number for that year of the Annales de Chimie et de Physique, M.