Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 104
Fig. 192. departures, the difference of latitude between two stations being the differencenorth and south between them; the difference of departure, the difference eastand west. Thus, N S (Fig. 194) being the meridian,and A B the course, A C is the difference oflatitude, and A D the departure. The… … \V^
Mechanical drawing
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