Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 91
y is then i. Platinum, accordingto the condition it is in, will cause only from ^ to ^^-g of its 92 Pumps and Hydraulics. weight of water to overflow, showing its specific gravity tobe from 21 to 21.5. But a more exact method than this iscommonly employed. The difference of weight of the… … Fig. 91. The specific gravity is then obtained by weighing the body first in air, and then, suspended by a fibre of silk or a hair, in water, and dividing the weight in air by the difference. It is hardly necessary to say that the substance examined must be free from mixture of foreign matters, and…
Hydraulic machinery · Pumping machinery
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