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Show [ J74 J 596 I THF. RIGHT BANK OF PL~TTE HlVEU, 1,970 }'EET l~i 'T!\ 1" ENCAMPAMDOE VNEt T0 lI E'• J .•.L u• 'VTi' J or THE GULF Of MEXICO. J.:• ' Determination oflongitudr, J unr :).. 6 ' 1 12-altilude of a. .llquiiUJ. OB ERVATIONS. SECOND Fll:mn: · I I Double ultltuJ Aguil:.e. of a 1 Tirm• of chronometer. Douhl , altitude of a ' Time of chronometer. I .\t}Ui-lro_. ___ ----- - - Deg. min. sec. h. til i ft, sec. Dtg. rnt:n. . ec. h. min. sec. 711 24 40 12 05 20.5 75 04 50 12 07 15.5 78 36 35 12 17 35.& 75 39 30 1~ 08 58.0 79 1G 45 12 19 30.9 76 ro 10 12 10 26.0 79 44 :30 12 20 66.0 76 47 16 12 12 10,0 -------- ---- -· RESUL'r OF CALCULATION. Mean time. Advance. Longitude. h. min. ec. Ji. min . sec. Deg. min. s~. lO 23 OG 1 50 59 99 17 47 • v 59~ [ 174 ] SECOND ENCAMPMENT ON THE RfGHT DANK OF' PLATTE RTVEH. Dctuminalion of longitude .. June 27: 1 42-altitude o;·~ .llquilm. 013, E R VA T ION!,. il Double altitude of tl Aquila•. Tim· of chronomrtcr. / 1 1 Double altituJ" of tJ j Time of chronometer. I Aquila· I Deg. 71 72 73 111in. 43 38 07 bCC. 10 50 00 Mean timr. !t. mm. sec. !t. 11 11 mnt. 51 57 sec. 42.0 20.0 Deg. rnin. .<1ec 7:J 26 20 ·1, - 73 52 4.0 11 5A 41.5 I 74 60 flO fndex. t•rror + 10 ~-lee RE ' ULT 0}' CALCULATION .. Advaurc ''· m1n ll 5 12 00 12 03 Longitude. 10 07 03 /1.. mtn. I 62 Deg . mm. sec. - ---- 9:.1 37 45 Determination qf latitude, J une 27, 1842- altitude o.f Polaris. OBSE RVATION .• Double altitude of Polan~-.. - ----- --- Deg. min. sec. 78 59 45 79 01 30 79 04 00 79 05 55 79 e1 oo Time of chronometer. h , mm 11 13 It !6 II 20 11 24 1! 26 sec. 03 46 40 12 05 sec. 38 52 38 ------.:__- --------- - ---- - --- True altit utle. -·---- Deg. min. sec. 39 30 50 RESULT OF CALCULATION. --- ------ -- _ /_ h. mm. sec 9 28 36 Latitudt.' . Deg. min. sec. 10 39 3% |