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: | 12 22 1830 |
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Description: | Increase Lapham's drawing of the geological profile between the Sandusky plains and Portsmouth, Ohio. |
Date: | 07 22 1827 |
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Description: | Letter from Benjamin Sillman to Increase Lapham requesting information about the canal around the rapids of the Ohio River for inclusion in The Journal ... |
Date: | 1833 |
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Description: | Increase Lapham's plan for the canal terminus on Portsmouth Point at the confluence of the Scioto and Ohio Rivers. |
Date: | 1849 |
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Description: | Pencil sketch of a cross-section of the Dells of the Wisconsin River. People are in a row boat in the center. Caption at bottom: "The Dells — Wisconsin Riv... |
Date: | 1864 |
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Description: | This map is pen and watercolor on paper and shows a profile and geological sections of the Apple River, Little Otter Creek, Woods' Branch, Bonners' Branch,... |
Date: | 12 1860 |
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Description: | Graph showing the profile of a semi-diurnal spring tidal curve deduced from 5452 half hourly ordinates obtained from the records of self registering tide g... |
Date: | 1864 |
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Description: | This map is pen and watercolor on paper and shows a profile and geological sections of the Blue Mounds, Hollow Run, Bogies Hollow Run, Bear Creek, East Bre... |
Date: | 1864 |
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Description: | This map is pen and watercolor on paper and shows a profile and geological sections of the Spensley Break, James Break, Wisconsin River, and Little Bear Cr... |
Date: | 1864 |
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Description: | This map is pen and watercolor on paper and shows a profile and geological sections of the East Blue Mound Break, Blue Mound Creek, Black Earth River, and ... |
Date: | 1837 |
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Description: | A pen and ink on tracing paper, hand-drawn and colored map the proposed route of the Milwaukee and Rock River Canal, ranging from the Rock River in the wes... |
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