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].

  • Norwood, Richard, 1590?-1675.
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.

    207/220 (page 195)
    Pofiferipe. 195° bles) then in the corner of a Card or {mall piece of paper fet down 10.08492, whichisthe tang. compl. of PR 39 deg. 26’ > and add it toevery of the numbers that are inthethirdColumn; as firft, to 9.70782, andthe f{umme is 9.80280 (caftingaway the firft unite, as isufial) which put in the fourth Column: Alfo proceed toadd it to the next.9,97422, aud thefum is. 9.85914; which alfo pur in the fourth column; and fo do with all the reft, till you have filled the fourth Column , and'thefeare thetang. table of tangents, and you fhall find againft them the {everal. . latitudes by which that arch'of a great circle BL doth paffe, an{werableto every fifth degree of longitudefrom 8. And fo.in: the firft and laft Column you fhal) have the whole fcope of the: ' work, fhewing by what longitudes. and latitudes that archof a . great circle doth paffe, as inthis example. Longit, RP B. {10.0849 jlang.compl.| Lat. This > might have been donein4 columns - d Om B | ere. fine compl, Pl, oe. ood. oP but I thought ic’ more co cos8 311971798] 9:8028032 25\eafie for the Learner ©5 0053 3119,.77422| 9.85914135 52/t0 do it in five ; and | 10 0048 31/9 82112} 9.90604|38 sijthough it requires 15° 0043 319, 86044) 9°9453¢|41 24|/Many words to exprefs - 20 0038 3119,89344l 9.97836.43. 3.4| the manner di the oe 5. 00 5 103|10,005o4las. 23) tations, yet the practice te nes pe cf is eafie and f{peedy,, fo » 9.96234)! 0.04726) 48 07 that one which isa little | 9.97691{10.06183149 04 verfed therein, may — pained Speen OO A as para make fuch a Table for 133 ¥19.9878c|'0:97277149 47/4 whole voyage., in ly. 1§|19/9°TO50 15] about an-hours {pace ;” 3 31 9, o9918|'08410l50 31 and ifthofethatarenot - 1 79\9.99985 £0.08477 59 34' fo ready fpend halfa’: 6 2919,99721\10-08213)/50 23) day,ora wholeday, it . 70-00 TE 29'9.991 nal1o.07614 sO 00} is no gteat time not la- hour, feeiog it may ferve for the whole voyage, or-it may befor « many Voyages tothe fameplace. . Somes: