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Title: Metal Twaddell hydrometer, by Hezzanith, English first half [Go to resource]
Description: Metal Twaddell hydrometer, by Hezzanith, English first half of 20th century. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: hydrometer Source: Science Museum Creator: Hezzanith Identifier: 1980-294 Go to resource More Like this...
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