File:Fig 1 and 2. Twaddel's hydrometer.tif
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Captions
Captions
Twaddel's hydrometer from Bee-Culture, Isaac Hopkins, 1907
Summary[edit]
| Description |
English: Twaddel's hydrometer for measuring the specific gravity of honey, from Bee-Culture, Isaac Hopkins, 2nd edition (revised Dec 1907) |
| Date | |
| Source | https://www.google.co.nz/books/edition/Bee_culture/gnVlAAAAMAAJ?hl=en&gbpv=0&bsq=Bee-Culture%20hopkins |
| Author | Isaac Hopkins (Q106121459) |
Licensing[edit]
|
This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer. This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929. |
| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | |
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