Station Pen in Washington. Triangulation party of O. B. French - occupied by J. S. Hill. Instrument was mounted on tree trunk. Instrument remained steady in azimuth but unsteady in level
Photo Category: Geodesy - Triangulation - Towers - Wooden
Photo Location: Washington
Photo Date: 1905
| Added On | 18th October 2015 |
| Viewed | 6 viewed |