top of page
Surveying Instruments
The following images are from Winterthur Museum, The Osher Map Library, and The Concord Library, home of Thoreau's tripod and compass.
 |  |  |  |  |
|---|
bottom of page
The following images are from Winterthur Museum, The Osher Map Library, and The Concord Library, home of Thoreau's tripod and compass.
| | | | |
|---|