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Title: Twaddell no 4 hydrometer [Go to resource]
Description: Glass streamline Twaddell no 4 hydrometer by J W Towers. Lead shot weight and paper scale. In blue cardboard tube. Range 0.74 - 1.02. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: Twaddell hydrometer
hydrometerTemporal: 1920-1960 Source: Science Museum Creator: J W Towers Identifier: 2005-520 Go to resource More Like this...
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