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Plane and spherical trigonometry (1887)

Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 273

An illustration from Plane and spherical trigonometry, 1887, leaf 273
E. | pts. E. N.N.W. 13. Required. 0 7° 0 W. 15° 0 W. S. 64° E. 14. Required. 0 6° C/E. 20° OW. N.44°W. 15. N.65°W. 0 10° 0 E. 3° OE. Required. 16. S. 15° W. 0 6° OW. 18° OE. Required. 17. S. 18°E. 0 25° 0 E. 10° V E. Required. 18. N. 30° E. S. by W. 11 12°0/E. 10° 0 W. Required. § 9. The Log. The… … Fig. 2. The Log-chip (Fig. 2) is a flat piece of wood in the form of asector, of about five inches radius,having its arc loaded with lead tomake it float in an upright position.The Log-line, to which the log-chipis attached by three strings, is anordinary cord about 150 fathomslong. The stray-line…

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