Inside Out Library
A manual for practical surveyors (1854)
Beans, E. W. [from old catalog] · Philadelphia, J. W. Moore · leaf 110
2i°. 104: A MANUAL FOR SURVEYORS. Years. Variation. 1790, 1 70■■■8 * 1800, 1 70 1810, 2°. 1820, 2f°. 1830, 3°. 1840, 3|° to 3f °. 1850, 4f°. 1852, 4f°. 1853, 4J° west. N. B. If the surveyor find the variation at hisplace for any year, the difference between that va-riation, and the variation found… … 105 m a o ao WEST VARIATION. 10 106 A MANUAL FOR SURVEYORS. TABLE OF NATURAL TANGENTS, Radius 1. CO OB 2 fcO to p b- ©rH as CO o CM CM ©CO Os as CO o GO O T-\ too rHCO GO cm CM *oo-«* rHCO GO iO T-i as CO cot~ rHO © 00 t-H © 7-1 T—l © i—1 © b- rH © o CO T~4 © COCO T—1 © coco © as co T-{ © CMb- T-^…Surveying
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
More pictures from A manual for practical surveyors
More like this
