1. Progress of the triangulation between western Nevada and the Pacific Coast : along or near the 39th parallel. June 30, 1890 Yale Public content 1890. 2013-10-25T14:53:28Z. 2013-11-21T21:32:38Z. U.S. Coast and Geodetic Survey, issuing body. U.S. Coast and Geodetic Survey. English. Public. California and Nevada.