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 216
afsNESW, and throughthe centre A, draw theE. by S. line AR, theS. S. W. line AB, andthe S. E. by E. line AC;and continue the twolatter indefinitely; but -A*upon the former ARtake AD = 15 miles 5through D draw DCparallel to AB, meet-ing AC in C, draw CBparallel to AD and it isdone ; for A will be… … By LOGARITHMS, Between the S; S. W* line AB arid the S. E. by E; line AC are 7 points^S= ZBAC-; and between the S. E. by E. line AC and the E. by S. line AD are two points = ^CADzrr £ ACB (becaufe AD, BC are parallel]—•therefore ACB -J- BAC = 9 points, and finee all three angles ACB; BAC,ABC are…
Navigation · Nautical astronomy
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