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Section II.—The Principle and Construction of the Closed Hydrometer

Published online by Cambridge University Press:  17 January 2013

J. Y. Buchanan
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Extract

The instrument being closed, its true weight is constant.

Let it be assumed that our experiments are actually made in vacuo, at the sea-level in lat. 45°. In these conditions the standard gram exerts a vertical pressure of 1 gram (true).

We weigh the hydrometer and find its weight to be W grams. We now float it in distilled water contained in a suitable cylinder. In the construction of the hydrometer the internal load has been so adjusted that, when immersed in distilled water of the standard temperature T, which is to remain unaltered during the whole of the experiments, the surface of the water shall cut the stem in some line C, near its junction with the body of the instrument. Then the weight of the water displaced by the hydrometer is exactly W grams.

Type
I.—Experimental Researches on the Specific Gravity and the Displacement of some Saline Solutions
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 49 , Issue 1 , 1912 , pp. 26 - 44
Copyright
Copyright © Royal Society of Edinburgh 1912

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