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Show [ 243] 144 .T?ncampnzettt at Mountain lake, 7.200 feet al01·e tlw le1:cl of tlzc Gulf of 111c.7:ico. IJETERJ.\UNATTOL'\ OF LATlTl DE. .August 10, 18.12.- A llilud of Polari ·. Observat io n.r-.·. J)oublc altitude of Po- Tunc of ehronomctt-1. lart5. ----- tit·~. 111 in. src. h. 111111 . -~I'C 1:34 55 20 1l l;l 55 4 55 50 11 17 Ot') R4 57 :w ll J 211 4 58 00 11 1 !) 56 - -- Jndex error==- 12". llesult of calculation. True altitude. fllcan time. Latitude ------- -- ------- -- 1- --- de~. min. scr. 4~ 27 25 It. ?I! iII, .~t'('. 8 51 42 dr~. min. ·' r. 42 50 Ocl 145 [ 243] Encampment at ftlounlain /ake-ContinuecJ . DETERM INA'l' lOt'\ OF LA'rlTCOE. August 11 , 1 ·12.-Altitudc of Pobri~ . Observatio1zs. ---- Double n ltitud of Po- Time of chronometer. Juris. dt:;. min. .\r('. ft . ntlll . ,,cc . "' 43 20 10 56 56 84 44 20 10 5 3~ 84 46 10 ll 00 33 84 46 30 lL 01 3lj 8 ~ 4 30 ll 03 37 8 ~ 49 30 1l 04 •t:l 84 49 50 ll 05 5~ 84 51 50 11 07 01 1:34 52 00 ll 0 2'3 84 52 50 ll 09 24 Thermometer, 54 °. Index error == - 121 ' . R esult of calculatio!l. True altitude. Me:m time. Latitude. dex. min. ser. 42 23 19 h. nnn. stc. 37 54 de.~. min. sec. 4~ 49 55 10 |