A complete collection of tables for navigation and nautical astronomy. With simple, concise, and accurate methods, for all the calculations useful at sea; particularly for deducing the longitude from lunar distances, and the latitude from two altitudes of the sun and the interval of time between the observations / By Joseph de Mendoza Rios.

  • Mendoza y Riós, José de, 1763-1816.
Date:
1809
Catalogue details

Licence: Public Domain Mark

Credit: A complete collection of tables for navigation and nautical astronomy. With simple, concise, and accurate methods, for all the calculations useful at sea; particularly for deducing the longitude from lunar distances, and the latitude from two altitudes of the sun and the interval of time between the observations / By Joseph de Mendoza Rios. Source: Wellcome Collection.

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    [ ] App. alt. G - , 4i°- 45' * App. alt. J) - • 27. 0 (hor. paralL 54'. 24) - Aux. Arg. Sum of app. alt. 68. 45 N. I. 39938 13'- 14 Compl. corr. O’s alt. + 59 • 4 7* + 6 Corredl. D’s alt. + 46 • 15 + 3 Prop, part + 21 - 13 • 23 J Corredled fum of alt. 70 . 30 . 40 N. II. 49935 (_App, diftance 97 • 29 N. III. 91 2Q?i8 Referved fee. 36I 41 Corr. diftance 96 . 51 . 26 N. IV. (fum) 19394 True diftance 96 ^2 • 2 _ Diftances, April 18, f at 9** 96. 38 . 0 Dift. 0”. 14'. 1 P..L. 110811 at Greenwich | at 12 97 • 59 . 18 Diff. I . 21 . 18 P. L. 34518 124 App. time at Greenwich ( + 9’^) 9'’. 31 \ 4^ P. L. - (diff.) 76293 O's polar diftance loC. 13' . 24 L. cofec. 0.00839 Latitude 0 . 31 • 0 L. fee. - 0.00003 G’s altitude ' 41-43 • 55 ... Sum - - - 143 . 28 . 19 Half fum 71-44 . 10 L cofine 9.49606 Half-fum—alt. 30 . 0 • 15 L. fine 9.69902 Apparent time at the fliip 3'*- 8 '. 29® L. verf. (fum) 9.20349^ Apparent time at Greenwich 9 • 31 • 4 Longitude of the llilp (diff.) 6 . 22 • 35 =9S“- 39' Weft. EXAMPLE II. May 6, 1794, about 6'*. 25', latitude 23:°. 12 S. longitude by account 66° W. the following diftanccs of the Moon’s remote limb from the Virgin’s Spike were obferved, to determine the true longitude of the Ihip; the height of the obferver’s eye above the level of the fea being 20 feet. Note, 43 mull be fubtrafted from the diftance, 2I^ 30^,.'^ from the ftar’s altitude, and 5'. o' added to the Moon’s altitude for the errors of the , quadrants. Altitude of -Jf. Altitude of D's lower limb. Dift. of d’s remote limb from 32“. 25'. q '33-22.30 34-19-30 35 -13-15 50“. 51'. 30 46 . 0 42 . 0 34-30 64'. 22'. 45'' 21-45 20 . 0 18 . IS 135 - 20.13 174. 0 82.4s 33-50- 4 — 21 .30 - 4-24 50. 43 - 30 + 5-0 4.24 •L 15 - ” 64.20.41 43 ~ 15 33 - 24.10 — 1 . 26 50 . 39- 17 64. 4.47 Corredl. of app. alt. i(-’s true altitude. I 33 • 22.44 Eftimated time at the fliip - - . 6''. 25“ Longitude in time - - - 4.24 W. Eftimated time at Greenwich - ~ 10.49 By Nautical Almanac,, for that time; 5's hor. femidiameter _ - - 14'. 59 ])’s hor. parallax - - * 54 • 59 Sums? Means (dividing by 4). ^ Errors of the quadrants. Dip of the horizon. ; D’s fcmidiameter. Apparent altitudes and diftance. \