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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 140

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 140
. Themost usual form isshewn in the figuresof the Transit and theTheodohte at the be-ginning of Part IV.Of the two represent-ed in Figs. 156 and157, the first has theadvantage of being ve-ry easily and cheaplymade ; and the secondthat of beino; fioht andyet capable of very firmly resisting… … 134 iOMPASS SURVEYING. [fart hi Fi^. 153. Fig. 159. Fig. 160

Surveying

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