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Filter: Subject of geology
| Date: | 06 28 1850 |
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| Description: | Letter from Increase Lapham to his wife, Ann Maria Alcott, in Milwaukee. Lapham was at Aztalan and wrote to Anna regarding the geology of the region. He in... |
| Date: | 1828 |
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| Description: | Increase Lapham's drawing and description of an earth borer for his handwritten manuscript, Notes and Accounts of Canals, Particularly the Ohio Canal Ne... |
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