A treatise on land-surveying; comprising the theory developed from five elementary principles; and the practice with the chain alone, the compass, the transit, the theodolite, the plane table, &c. Illustrated by four hundred engravings, and a magnetic chart (1875)
Gillespie, W. M. (William Mitchell), 1816-1868 · New York, D. Appleton · leaf 189
the sum of DBand CE, or by HJ; i. e. to the product ofthe Latitude of the 2d couise by its Longitude. The area of the Triangle ACE is equal to the product of AE byhalf EC, or by KL ; i. e. to the product of the Latitude of the; 3dcourse by its Longitude. CaUing the products in which the Latitude… … • The last course is a preceding course to the first course, as will appear onremembering that these two courses join »ach other on the ground SHAP. VI.] Calcnlatln? the Content. 185 ducts. The Difference of the North Products and the SouthProducts is therefore the desired area of the three-sided…
Surveying
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