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Description: Glass specific gravity hydrometer by Hicks, mercury weight sealed by wax, with paper scale, range 1000 - 1015, in tinplate tube. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: hydrometer Temporal: c. 1930 Source: Science Museum Creator: Hicks Identifier: E2008.22.19 Go to resource More Like this...
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