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 218
ach Jhtp f By PROJECTION, Draw the compafs ESW, and letthe centre B reprefent the weftern-moit port, draw the E. by N. lineBD=4oo miles, and D will be theeafternmoftport; with 300 in yourcompaffes, and one foot in B, de-fcribe an arch ; with 450,7 inyour compaffes, and one foot in D,defcribe.… … By Theo. IV. Trig.Divide the triangle BCD into two right an-gled triangles by means of the perpendicularCA, and bifeclBD in a, thenAsthebafeBD 400 ar. co. 7.39794 Is tothelumof BC.CD, 750.7 2.87547 Soisdiff. ofBC, CD, 150.7 2.17811 To twice A a 282. 8 2.45152 Half or A a\ BDz=Ba=Diff. is BA 141.…
Navigation · Nautical astronomy
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-343-234.webp)
