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Title: Glass Twaddell No 5 hydrometer by unknown maker. Range 102 - [Go to resource]
Description: Glass Twaddell No 5 hydrometer by unknown maker. Range 102 - 138. 146mm long. Mercury weight and paper scale. In cardboard tube, not original (tube is too small), 1900 - 1960. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: hydrometer Temporal: 1900-1960 Source: Science Museum Identifier: 1997-1134 Go to resource More Like this...
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