The new American practical navigator : being an epitome of navigation, containing all the tables necessary ... (1802)
Bowditch, Nathaniel, 1773-1838, Lee, Marvin, former owner. DSI, Stuart, Gilbert, 1755-1828 DSI, Burndy Library, donor. DSI · [Salem] : Printed at Newburyport, Mass., 1802, by Edmund M. Blunt, for Cushing and Appleton, Salem : Sold by every book-seller, ship- chandler, and mathematical-instrument-maker in the United States and West Indies · leaf 39
. Therefore Ab=BN=CO=DP, &c. and Bb=CN=DO=EP, Sec. but (by Art. 51)BN=bc, CO=cd, DP=de ; therefore the line Ab=bc=cd=de, &c.and fince (by conjlruftion) AB=BC=CD, Sec. any line AE will be thefame multiple of A B as the correfponding line A e is of Ab ; and AG isthe fame multiple of A B as A… … Gfomf.tr. yLVL • »/
Navigation · Nautical astronomy
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