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Show [ 174 J 414 ENCAMPMENT ON SNAKE RIV:f~R, ADOVE THE AMERICAN FALLS. Determination of lalitude, Septcnt!Je1' 21, 1 '1:1-ultitudes of Polm·is. UllSEHVA'l'JONS. ])oublc altit udcti of PuhtriR · 'J'imo of chrouomt•tcr. • --------------~- Deg. Til/'ll. 8(i u; 6 I ~I G IH 86 19 () :il True nltitude. Dt:g. mm. .~('(· . 4:1 09 08 •' /f'C. ()0 20 20 40 10 Indr\ error = + 1 min. tJ!) ~<CC . lU:s tTJ~T 0 J.' (' ALCU L 1\. 'I' ION. Mean t.im<'. h. mm. src. 'l 10 lU h. R / NOO~ HALT ON SNAKE RIVl'~R. 11liTI. .ycc . 1G 21 iJR 22 49 35 !il 49 51 I \ Latitude. ne~. mtn. sec. 12 47 05 Delet·rn1:nalirm (d /rrlit udt>~ Sr·pl. 28, 1843-meridinn alhtudfs of the sun. omn; RVA 1'JONS. Double nltitucl1•s of tho 8tm\, lower luuh. 'J'imc of chronom~ter. J)t'~. min. ·'fC. h. I1H1t. SIC. 80 tl2 ~) 0 0 fi!) () 8!) 1!1 16 Of> 56 9 43 00 !Hi tO 89 •12 4() 57 15 R9 42 10 57 56 89 1 t 50 () :12 9 t1 l 10 59 17 9 ,10 00 01) ] ~ ~!) 37 45 02 00 h9 ,Jf> 2U O'J 41 ln<l ,X l'rJOT + t mm. . 4r.>: RI'C lU<! UL'I' O.It" CAL ' Li\1'JON . Truo central altitu1l<•. A pparcnl time of transit. J,atitudo. lt. min. Dr g. min. ate. De~. rnitl. • l.C. src. 29 56 4.5 07 24 0 61 211 4~ -- - 415 [ 174 ] ENCAMPMENT ON ROCK CREEK OF SNAKE RIVER. Dele1'1nination. nf latitude, September 29, 1 43-altitudfs of Polaris. omm&VA1'10~ ' , Double altitmlc" of J>otariH. 'l'itno of chronowctN . Deg. min. .set·. 86 06 10 86 07 10 R6 08 liO 86 0 .)0 86 lU 1.0 86 10 40 86 ll 25 S(i 1 ~l 60 (j 1:1 !)0 86 15 10 lt . min. sec. ~ 00 !J:3 11 27 12 :l5 13 22 14 42 15 14 ]() 60 1 tj 3 19 52 21 31 Jmh-' Mror.. -1- I min. 16 R c~ tu;.'U J.'J' OF CAI.CULATION. Tru altittuh• J ,ntitude. Deg. min. ·f·c. 43 05 OG Drg. min. uc. 42 26 21 • lt. ruin. sec. H ll 40 Determination of' longitude. ·"'t pl. 2~1 1 "13-al!itudes oj o. .llnrh·orned;:e. OH ~.EnVA'I'IO ' Double nltitucJcs of a AlldrOlJlcdw. Time of rhmnomctcr. ---- ----- Deg. miu. \f'C. 100 l(j lO 100 45 10 101 17 50 lndr:\ error .. + l min. 4 5 sec. -----·--------- Moan time. lt. min. .<~cc. 8 23 08 • 10.~' Tl.'l' OF' Ci\ L<.:UL TlON. Advunco. h. min. sec. I Oj 47.0 ft. 111 in. .,ec. 9 % :J3 26 53 ~ 2l ],ongituJr. ----------- ------------------------~------------------- |