The elements of medical chemistry : embracing only those branches of chemical science which are calculated to illustrate or explain the different objects of medicine, and to furnish a chemical grammar to the author's Pharmacologia . t we have only to multiply the sp. gr. of the solutionby that found, in order to arrive at the conclusion. 65. In like manner, we may easily find the specific gravitywhich a body will assume when weighed in any other mediumthan that of water, viz. by dividing its true specific gravity bythat of such a medium ; thus, a body whose specific gravityis 2-5 if weighed in
The elements of medical chemistry : embracing only those branches of chemical science which are calculated to illustrate or explain the different objects of medicine, and to furnish a chemical grammar to the author's Pharmacologia . t we have only to multiply the sp. gr. of the solutionby that found, in order to arrive at the conclusion. 65. In like manner, we may easily find the specific gravitywhich a body will assume when weighed in any other mediumthan that of water, viz. by dividing its true specific gravity bythat of such a medium ; thus, a body whose specific gravityis 2-5 if weighed in Sulphuric acid would give an apparent 2-500one of 1-333, thus =1-333. If in the sea water (1-026) of 2-436. The knowledge of this simple fact is of greatpractical importance, as it will at once enable \he chemist, atsea, to use the water of the ocean, in his experiments, withas much facility and accuracy, as if he employed that whichhad been distilled. 66. This subject may perhaps receive a clearer explanationby the statement of the following problem. Suppose a pieceof Opium weighing 30 grains, is found to weigh only 9-5grains when immersed in olive oil, what is its specificgravity ? G4 PARISS MEDICAL CHEMISTRY 30. 1*46 Apparent Sp. Gr.•915 Sp. Gr. of Olive Oil. 7301461314 33590 True Sp. Gr. Q. E. J). G7. There is still another mode in which the speciiic gravityof solid bodies may be estimated, and which is founded uponthe proposition that a bochj immersed in a fluid displaces a quan-tity equal to its bulk. If, then, into a bottle oi water, theweight of which is accurately known, we carefully drop ahundred grains, of the substance to be examined, we shalldisplace a quantity of water equal in bulk to these hun-dred grains, when by weighing the bottle we shall easilyfind, by the difference of weight, the specific gravity of thematter under examination. Suppose, for example, ti~e bottleis found to weigh fifty grains more than it did when filled withwater only, we may,
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Keywords: ., bookcentury1800, booksubjectchemistrypharmaceutica, bookyear1825
