Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 107
ws: Angle.41° 40 Angle.41° 40 Nat. sine. 0-66480 Nat. cosine. 0-74703 Distance. 350Distance. 350 Departure. 233 Latitude. 261 In the third line of the third column the angle, instead of 120°, is setdown at 30°, because, when an angle is in excess of 90°, 180°, or 270°, the ex-cess is the angle of… … either all departure or all latitude. In the tables the latitudes are identical forangles and for their supplements, and so are the departures. Eeference to Fig.75 will illustrate this, calling the sine latitude and the cosine departure. Course, 0-11-22-33-44-55-66-0 Azimuth. 41° 40 85 30 120 00…
Mechanical drawing
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