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Show [ 243] 136 GOAT l LAXD, &c. Favorable weather enabletl us to ob etve h re nn occultation of E Arieti~ which occurred at the moon's bright limb, at Oft. 05' 10" of the 31 ·t. of July (civil time). In order tltat it might be calculated with the advantacre of corH'" pondent oh·cr\'ations, and the COlT ction of th e errors of the ti'llllc. , th~ observation wns cnt to 1\'Ir. . ~ . \V.\LI ER, :1.t Philadelphia. The followmg i· the result from 1\'lr. Walker's computation, \Vithout any correction for error of the tables. Julp 30, 1842-astronO'Inical time. t rl' a b c ln1. c Atictis l2h 5' 40" - 7 h 10' 32''.01 + l.896 + 1.611 + 2.4 8. By the estimated uiiference of longitude, thirty two seconds (32''), the· 1nnnr distance ob erved at the mouth of the Sweet Water on the 23d of Augn t, Is referred to this place: for the lono·itude of which we have adopted the mean from chronometer, lunar distance, and occultation, resuiLinrr as follows: h. Longitndc of Goat i land, by lunar distance, = 7 Longitude of Goat i ·land, by chronometer, = 7 Longitude of Goat island, by occultation , = 7 min. cc. 10 07.91 10 5l.66 10 32.01 ~lean lonrritude of Goat islnnd, = 7 10 30.53 ome of the obscn-ations made at this plnce were lost in the accident in the Platte river, on the 24th of August. 137 [ 243 } En/'aJUP1'7C7ll on rioat i:lmul, LVortlt fork of tltf' l~latte river. DI•:TERi\11~ \1'10~ OF L \TlTUOE. Jnly 30, 1 4.:2.-Altitnde of the Sun in the mcridiaB. Dulltllr altitude of the Tr·ue central altituue. Latitude. Snn'~ lower limb. t!tz. 131 h. 0 min . ~t2 wr. :w d t!l;. 111 i 11. srr. (j5 5() :>:2 llldex error dr~. 42 TH~TER~ I'\ ATIO~ OF J.ONGlTUDE. ~~ r. 27 July 31, I, 42.- Altitndc of a Aquil a·. Ohsf'1'Vations. Do11 bl altitud of n Time of chronometer. Aquil;:c. d<p;. min . sec. h. min. sec. !l!) !d 5() 3 Ol 0:2 !.10 09 30 3 04 02 !) 4.) 50 3 05 42 Jl f' sult qf r;alculat iou. -----~------------ Mean time. Advo.nrc. J Jongitmlc. llllll. 4G ft. 2 min. lG S('('. 3G · • • •• • • • • •• • • • • •• • • • • • DF:TF.R:\ li~A TION Of.' LONGITUDE. July 31, 1842.-Altit ude of a Au riga~. Ol)servat ious. Double altitude of a Time of chronometer. Aurigx. It. min. sec. 4 13 4U de~. min. sec. 4 38 20 1lesult of calculation. --------------------------------------- Mean time. Au vance. Longitude. ft. min. st>c. deg·. min. sec. 2 lG 31 •••••••••••••••••••• It. min. sec. 1 57 0!.1 , |