Scale Designed to Weigh Objects While Underwater

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“The most common way of determining the density of such a body [that is heavier than water] if it is unsoluble in water, is to find its weight in air (w); find its weight when immersed in water (w’); divide the weight in air by the loss of weight in water.” -Avery 1895


Elroy M. Avery School Physics (New York: Sheldon and Company, 1895) 168


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