File:Hydrometer.png

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Hydrometer.png(130 × 322 pixels, file size: 18 KB, MIME type: image/png)

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. This particular scan of the image came from Wikipedia.

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current04:47, 2 July 2006Thumbnail for version as of 04:47, 2 July 2006130 × 322 (18 KB)BrewWiki (Talk | contribs)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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