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 144
a fhip fails 6 knotsper hour, with a.glafs of 24 feconds and a log-line of 60 feet per knot, hertrue velocity willie 9 miles per hour; becaufe 50X 24 : 30X60 : : 6 : g« • Tr.field of in..Implying the lenSth of the .rlnPibv .50. and the line by 3D, you miy multiply the former by 5 and the latter by… … ARALLAX (or diurnal parallax), is the difference between the true altitude of the fun, moon, or ftas, obferved at the centre of the earth, and its apparent altitude, obferved at any point of the earths furface.The true place of any ftar S, is that point of the heavens H, in which it would be {een…
Navigation · Nautical astronomy
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