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A hydrometer of constant weight. This device measures the specific gravity of liquids. The specific gravity is the ratio of the density of the liquid to the density of the water

Hydrometer

A hydrometer of constant weight. This device measures the specific gravity of liquids. The specific…

A hollow cylinder carrying a basket at its lower end, which is heavy enough to keep the apparatus upright when placed in water. At the top of the apparatus is a pan for holding weights.

Nicholson's Hydrometer

A hollow cylinder carrying a basket at its lower end, which is heavy enough to keep the apparatus upright…