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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 177

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(279) Calculation of Latitudes and Departures. be a given hue, of which the lengthAB, and the bearing (or angle, BAC,which it makes with the MagneticMeridian), are known. It is requiredto find the differeiices of Latitude andof Longitude between its two extremi-ties A and B: that is, to find AC…

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