Plane trigonometry, and its application to mensuration and land surveying. Accompanied with all the necessary logarithmic and trigonometric tables (1852)
Perkins, George R. (George Roberts), 1812-1876 · New York, D. Appleton · leaf 99
in-man stretches the chain.The point on the ground directly under the elevated end of thechain may be determined by means of a plummet. When thesurface is very much inclined, it will be necessary to measureonly the distance of a part of the chain at a time. When a survey is made for a finished… … The dividers consists of two legs, AB, AC, movable about ajoint at A, so that the extremities B and C may be brought toany desired distance from each other within the limits of itsspan. It is employed to transfer and measure distances, andto describe arcs of a circle. §65.] SURVEYING. 89 PARALLEL…
Plane trigonometry · Surveying
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