A treatise on surveying, comprising the theory and the practice ; (1887)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, 1840- [from old catalog] ed · New York, D. Appleton and company · leaf 22
mile.It is composed ofone hundred pieces ofiron or steel wire, orlinks, each bent at the end into a ring, and connected with the * This length was chosen (by Mr. Edward Gunter) because 10 square chains of 66feet make one acre, and the computation of areas is thus greatly facilitated. Forother… … 8 LAND-SUR VEYING. ring at the end of the next piece by another ring. Sometimes twoor three rings are placed between the links. The chain is then lessliable to twist and get entangled or kinked. Two or moreswivels are also inserted in the chain, so that it may turn aroundwithout twisting. Every…
Surveying
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