File:Hydrometer.png: Revision history

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24 July 2006

2 July 2006

  • curprev 04:4704:47, 2 July 2006‎ BrewWiki talk contribs‎ 156 bytes +156‎ Hydrometer from Practical Physics, publ. 1914 by Macmillan and Company - now in the public domain under US copyright law since it was published before 1923.
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