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Title: Six Twaddell hydrometers by J W Towers, Widnes. Lead weights [Go to resource]
Description: Six Twaddell hydrometers by J W Towers, Widnes. Lead weights and paper scales. In wood box, possibly teak. No.1 equals range 0 - 24, No 2. equals range 24 - 48, No 3. equals range 48 - 74, No 4. equals range 74 - 102, No. 5 equals range 102 - 138 and No. 6 equals range 138 - 170. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: hydrometer Temporal: 1943 Source: Science Museum Creator: J W Towers Identifier: 2005-442 Go to resource More Like this...
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