| Title: | Observations on Terrestrial Magnetism and on the Deviations of the Compasses of the United States Iron Clad Monadnock During Her Cruise from Philadelphia to San Francisco, in 1865 and 1866 |
| Author: | Harkness, William, 1837-1903 |
| Note: | Smithsonian Contributions to Knowledge #239; 1873 |
| Link: | page images at HathiTrust |
| Stable link here: | https://onlinebooks.library.upenn.edu/webbin/book/lookupid?key=olbp88363 |
| Subject: | Geomagnetism -- Observations |
| Subject: | Magnetism of ships |
| Subject: | Monadnock (Ironclad monitor) |
| Call number: | QC831 .H2 |
| Other copies: | Look for editions of this book at your library, or elsewhere. |
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