Specific Gravities.Specific Gravity, or weight, is the measure of force with which matter, in its various forms, falles, when unsustained, towards the earth's centre. It is best determined by poising solids in water, and gases in air; and the relation to equal bulks of water or air, is the relative weight of an equal bulk, called the specific gravity; gravity being in this case synonymous with weight. [List of Gases, liquids and solids follows with more text:] ...If a structure of oak weighs 1,170 lbs., a similar one of exactly the same cubic contents, made of deal, would weigh only 555lbs. A bottle capable of containing 10 lbs. of water will hold 18 lbs of sulphuric acid, the latter being nearly twice as heave as the former.
Letterpress and engraving. 285 x 228mm. 11¼ x 9".
The hydrostatic balance used for ascertaining the specific gravity of solid bodies, which are suspended in water by a horse-hair attached to the bottom of the scales. From Reynolds' 'Pictorial Atlas of Arts, Sciences, Manufacturers and Machinery'.
[Ref: 26140] £130.00