Publisher's Synopsis
Excerpt from General Medical Chemistry: For the Use of Practitioners of Medicine
The substance taken as the unit Of the specific gravities of solids and liquids is water. The specific weights of gases are usually referred to air as a unit; it is better, however, to adopt hydrogen as such unit (see p. When we say that the specific gravity of sulphuric acid is we mean that, volume for volume, sulphuric acid is one and eight-tenths times as heavy as water.
The determination of the specific weight of a substance is frequently Of great service. Sometimes it affords a rapid means of distinguishing between two substances similar in appearance; sometimes in determining the quantity of an ingredient in a mixture of two liquids, as alcohol and water; and frequently in determining approximately the quantity of solid. Matter in solution in a liquid; it is the last object which we have in view in determining the specific gravity of the urine.
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