MARKING THE ALASKAN BOUNDARY 



Some of the difficulties of triangulation. Climbing an almost vertical cliff by a rope. 

 This cliff is almost ioo feet high, and affords the only means to reach the summit. The man 

 on the rope has a theodolite on his back. This ascent had to be made five times before the 

 necessary observations were completed. Photo by E. R. Martin, Alaskan Boundary Survey. 



