Standard Field Tables and Trigonometric Formulas (6th Edition)

1942 6th edition hardcover. Past owner's name stamped on the edge of pages top and bottom of book as well as inside the front cover and on the first page. There is also 75 written in pencil on the first page. Two pages short of the end, the binding is cracked. Otherwise, the book appears unused and in great condition.  This book served as the mathematical pocket supplement to the General Land Office's (now Bureau of Land Management) Manual of Surveying Instructions. It provided cadastral surveyors with the exact data needed to plot and subdivide public lands. Included are: Logarithms of Numbers & Functions, Natural Tangents & Cotangents, Traverse Tables, Convergency of Meridians, Azimuths of the Tangent to the Parallel, and Latitude & Longitude Tables. There are also Gunter’s Chain conversions. Tables standardized measurements between chains, links, rods, and feet. Plus conversion tables for the vara and the arpent, which were used for older Spanish and French land grants in the Southwest and Louisiana. Published by the Government Printing Office.