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Show [ 174 J 648 ENCAMPMJ·~N1' ON TJJl~ LEI•'T B -\NK 0£" PLA'lTE RIVEH. JJetPrmination of longiludt', September 16, 1842-di. lance jl·01n I he first limb of 1/u• moon to Jupiter. . (With tho circle.) Time of rhronomctcr. A pp:lrcut di,.;tnnr(•. lt. min. ~ :~6 9 {:! 9 4() 9 52 !) ~s 10 0:3 10 OG 10 10 10 l t 1() lH 10 21 10 25 10 2A 10 30 10 :13 10 ;j6 10 31 10 40 10 ·12 tO 4f> - -- True distance. De~;. min. .vee. ·42 07 42 . ~t'r. Del{ . :17 21 ~3(; 19 51 40 44 21 28 ~~ 67 4!) 13 18 !)6 to !)-1 25 37 11 837 ·-- - - - - Thermometer 55°.5. tn;sUJ.T OF CALCULATION. \1 ran time at Greenwich. h, min. sec. 14 56 30 1/tl'fl , .'fee . 46 60 Longitude. - - -- Deg. min. sec. 100 23 45 -- t__ ______ -------- ----- -- 619 [ 174 J ENCAMPMF.NT () THE J,Bt"r TIA Nl OJ•' l'LATTE IHVER pete1·1nination of time, September 17, I 42-altiludc of .!h·cht'I'US. ODS En V A'riONS. l'lJlS'T' 1-H: JtH:'l. Double altitude of Arcturus. Tirno of du onomctcr. Doull!P altitu.do of An·- ~ Time (:;-rhronomt•1cr. j t11rw;. I De~. min. stc. ft. min sec. Deg. 1/tlft. srr. ''· till" . W'(', 37 10 40 9 <1H 5(). () :H O:l 15 • 9 5i" 35 2:3.7 ~8 4!) 9 5!J :JO.!) 33 08 !) () 9 5!J 16 0 34 1H 15 9 55 15.0 32 25 20 10 ()J 14.0 RESULT OF CALCULA TIO~. Mean t imP. Advance. Lougi t udc. -- --~--- ft. min. ser. /t tfll n. St'C. 1 5H 1 L 1 57 'l5 Determination of lutitud£), September 17, 1 <l2-altitude of Polaris. OBSE R ATJQNS. Double nlt.itud of PuLm . • Time of ('hwuomctrr • IJrg. min. sec. lt . min. Sf.l'. 2 14. 00 J() 'H 36 82 16 10 10 ](j ;n 82 17 10 10 )!) 35 82 I!) 50 10 21 fj fl 2 21 tf!) 10 25 1~ 82 21 4() lO 27 50 82 '27 25 10 31 -18 82 :w 00 10 31 51 82 34 50 10 40 50 82 39 50 10 47 4-1 - - .. - - - -------- Thermometer 55°. Index error r= - 1 min. I ecc. RE ULT OF CALCULA'l'ION. True altitude. Mean time. Latitude. --------------------- ----------- Deg. min. sec. 40 42 38 Dcg. min. sec. 41 10 36 lt. rnm. sec. 8 30 41 ~------ 42 --------------------~-------·---------------------- |