Elements of surveying and levelling; with descriptions of the instruments and the necessary tables (1870)
Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes & Company · leaf 26
the root; then find the number corresponding tothe resulting logarithm, and it tcill be the root required. example. 1. Find the cube root of 4096. The logarithm of 4096 is 3.612360, and one-third of this is1.204120. The corresponding number is 16, which is the rootsought. sec: n.] GEOMETRICAL… … 21. The dividers is the most simple and useful of theinstruments used for drawing. It consists of tw*o legs ha, Ic,which may be easily turned around a joint at t. One of the principal uses of this instrument is to lay off ona line, a distance equal to a given line. For example, to lay ofif on CD, a…
Surveying
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