"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

Scale Designed to Weigh Objects While Underwater

"The most common way of determining the density of such a body [that is heavier than water] if it is…