Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 323
te thrown away when one can get only flying shots at thehorizon, from the crest of a 60-feet wave. Showers of salt spray, with thechance of an occasional knock, certainly seem less suited to the sextant thanto its hardier and more humble relative. — Captain Lechy, in Wrinkles inPractical… … Fig. 22. The refraction varies slightly according to the condition ofthe atmosphere, but this variation is not taken into account inthis chapter. Dip of the Horizon. Let BH (Fig. 23) represent the level of the sea, 0 the posi-tion of the observer at the height OB above the sea-level, Cz the centre…
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