Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 303
o the left of21° R. of S. SOLUTION BY DIAGRAM C.N. (Example 1) is the direction of the needle of the compass on ship. N.E. is the direction in which the ships head is pointed. O is the direction of the object from the ship. Draw a line so that the line 0 shall make with it an angle S. 89° W.,and it… … C.E. C.W.
Trigonometry · Surveying · Navigation
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![An illustration from L'optique divisée en trois livres : ou, l'On démontre d'une maniere aisée tout ce qui regarde 1. la propagation & les proprietez de la lumiere. 2. La vision. 3. La figure & la disposition des verres qui servent à la perfefectionner [sic] (1682)](https://img.insideoutlibrary.com/img/200/ia-loptiquedivise00ango-329-36.webp)