| 1. |  | Great Salt Lake Base and Meridian. February 2010 | Surveying; Salt Lake City (Utah); Pratt, Orson, 1811-1881; | These two images are of the Great Salt Lake Base and Meridian points in Salt Lake City. The point was fixed by Orson Pratt and Henry G. Sherwood in August, 1847, and all city streets were named and numbered... |
