Trigonometrie. Or, the doctrine of triangles: divided into two books. The first shewing the mensuration of right lined triangles: the second of spherical ... Both performed by that late and excellent invention of logarithms ... Whereunto is annexed (chiefly for the use of sea-men) a treatise of the application thereof in the three principal kinds of sailing. With exact tables of the suns declination ... and tables of the right ascension and declination of some eminent fixed stars ... Also other necessary tables used in navigation / [Richard Norwood].

  • Richard Norwood
Date:
1661
Catalogue details

Licence: Public Domain Mark

Credit: Trigonometrie. Or, the doctrine of triangles: divided into two books. The first shewing the mensuration of right lined triangles: the second of spherical ... Both performed by that late and excellent invention of logarithms ... Whereunto is annexed (chiefly for the use of sea-men) a treatise of the application thereof in the three principal kinds of sailing. With exact tables of the suns declination ... and tables of the right ascension and declination of some eminent fixed stars ... Also other necessary tables used in navigation / [Richard Norwood]. Source: Wellcome Collection.

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    by the plala Sea-Chirt. the Triangle 4 €:C, and the'fide ‘A E 1b Miles. Say then} | toA € 100m, 2.00000] to AE 100m. fos E 64.23. “9:95537| fos BA C 2p 3279-63451 to A.C.14345,) AT 57E2 tO EC, 6865 9 on. 1683626 miles : In all a122,-miles, that \is neer w sw a quarter point we~ fterly 143 62 miles, and es ¢.a quarter of a point eafterly 6&4; miles, 19 Let the difpance from:A to E:be 100 miles Sonthweft, the wind at the wind.(hé makes her way good? - Here from A’C 143, 6° thererefts EB = 75_ mules. Then fay, , ‘Asth’Gde “EB smiles, gempl.ariibe. | 8.12494 | tostheanole BAL 4asdeg.oo, 9.84948 {gisthefide 4 E xoomules, 2 ©9000 » tos the angle at- B.qo deg. 32°. 997442. Whereto isequal the anole B34 C, whence I conclude, that that the wind beirg at South, fhe makes her-way good upon the one tack neer w 5 3 point welterly, and uponths ozher ese point ealterly. Ihave about 22 years paft, inmy book ‘entitled, The Sea-msans