Davies, Charles, 1798-1876 · New York, Cincinnati [etc.] American book company · leaf 262
11 256 ELEMI5NTS OF SURVEYING. [book VII. little more tliaii a tentli of ji foot long, so Uuit in any position atenth, or a foot figure, ciin be seen on the surface of the rod. The right edge ol the opening is chamfered, and divided intoten equal spaces, corresponding with nine-huiidredths on…
Surveying
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