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 65
it verticallyinto the ground, and resumes his courseto the length of another chain. After one or two chains have beenmeasured, on any line, the fore-chainmancan, by glancing back to the station just left, place the pin nearly in the right position: the exactaligning should be left, however, to the… … SEC. I.] MEASUREMENT OF DISTANCES. 63 All distances should be measured liorizontuily: Hence,when the ground slopes, one end of the chain must be ele-vated. Each chainman should be provided with a small plumb-line, so that the elevated end of the chain may be held directlyover the proper point. When…
Surveying
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Catalogue] (1908)](https://img.insideoutlibrary.com/img/200/ia-catalogue00demo-101-241.webp)
