The American practical navigator : being an epitome of navigation and nautical astronomy (1888)
Bowditch, Nathaniel, 1773-1838, United States. Navy Dept. Bureau of Navigation, Cooper, Philip Henry, 1844-1912 · Washington : Govt. Print. Off. · leaf 32
tion, inamount directly proportional to the tangent of the dip. Art. 43. QuADRAXTAi, Deviation.—The deviation caused by the magnetism of the soft iron, induced bythe horizontal force of the earth, is more complex. It may be resolved into two parts; one acting toward theships head, equal to the…
Navigation · Nautical astronomy
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