Glass and Mercury Antique Hydrometer in Original Wooden Box cracker which I found at a

which I found at a fantastic estate sale of a world traveller and avid collector in Lynn

presumed early 20th century

Cork and Belfast

with all of the hinges working well and the drawer opening with ease

Glass and Mercury Antique Hydrometer in Original Wooden Box cracker which I found at aAt first I thought this antique Griebel Instrument Co. hydrometer was an old thermometer, until I noted that the numbers on the side run 0 to 6 rather than showing temperatures. Ive since learned that a hydrometer is used for measuring the relative density of liquids based on buoyancy: you pour liquid into a container, lower the hydrometer into it until it floats, and then the point at which the surface of the liquid touches the stem of the hydrometer