B/W folding chart showing the Progress of the Triangulation Between Eastern Utah and Western Nevada. The map is centered on the Great Basin and shows the main lines of triangulation made during the year ending in June 30th, 1893.
Progress of the Triangulation Between Eastern Utah and Western Nevada, 1894
Chart 14. Progress of the Triangulation Between Eastern Utah and Western Nevada along or near the 39th Parallel. June 30th, 1893.