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Title: Glass oilimeter (hydrometer) with scale 0.820-0.840, inscrib [Go to resource]
Description: Glass oilimeter (hydrometer) with scale 0.820-0.840, inscribed "Hydrometer for mineral oils, Temp 62 degree fahrenheit", around the early 20th century. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: hydrometer Source: Science Museum Identifier: 1964-531 Go to resource More Like this...
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