Glass and Mercury Antique Hydrometer in Original Wooden Box matches A truly wonderful set

A truly wonderful set

I found this one at an estate sale in Lowell

Nuanced and unique from every angle

I have found the work of an NYC based artist named Sue Kutosh online

I believe one is ebony and the other two are either walnut or teak

Glass and Mercury Antique Hydrometer in Original Wooden Box matches A truly wonderful setAt 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