| View Cart ⇗ | Info

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


International Correspondence Schools A Textbook on Mechanical and Electrical Engineering (Scranton, PA: International Textbook Company, 1897)


TIFF (full resolution)

892×2631, 916.0 KiB

Large GIF

347×1024, 86.7 KiB

Medium GIF

216×640, 38.6 KiB

Small GIF

108×320, 12.6 KiB