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A treatise on land-surveying; comprising the theory developed from five elementary principles; and the practice with the chain alone, the compass, the transit, the theodolite, the plane table, &c. Illustrated by four hundred engravings, and a magnetic chart (1875)

Gillespie, W. M. (William Mitchell), 1816-1868 · New York, D. Appleton · leaf 245

An illustration from A treatise on land-surveying; comprising the theory developed from five elementary principles; and the practice with the chain alone, the compass, the transit, the theodolite, the plane table, &c. Illustrated by four hundred engravings, and a magnetic chart, 1875, leaf 245
y in using siT»aIlangles of deflection for railroad curves. 238 TRAXSIT AXD THEODOLITE SIIIIFE¥IXG. [part it. (355) Arc of excess. On the sextant and similar instru-ments, the divisions of the limb are carried onward a short distancebeyond the zero point. This portion of the limb is called the… … 10 9 8 7 6 5 4 3 Z 1

Surveying

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