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Title: Nicholson's hydrometer by W. & J. George and Becker Ltd. [Go to resource]
Description: Nicholson's hydrometer by W. & J. George and Becker Ltd. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Temporal: 1945-1954 Source: Science Museum Creator: W. & J. George & Becker Ltd Identifier: 1984-878 Go to resource More Like this...
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