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Show [ 17-l ] 636 J~N CAMPMEN'I' ON 'J'Hl~ UH: DLlJl~ HIVgR. /)PI<'?'rnJnrtlion uf longitude, ./uue 21, l 42-allilutle of the .'Htn. o B'' l·~n \ ' A'l'l O':'JS. ------ il II .., ~: t · u II "l.lt I UL ----p-----~- --- - -- - I ---- Douhl<· altitudt• or lh<· l Tim of rhrOJlllllH'It•!', Don hi<· t~ ltitudt• of lht• Time nl' rhronomctcr. low<"r I i tnh of tlw ~Hill. 1 !I I<HV<'r limh nf' thr s1 111. nep,. 12 12 42 n 1:l lfl/)/ . Nl'l'. on JO :16 10 !)J 10 OR HI :w :to Mrnn tim". h. miu. lief. 6 ~0 21 h. utili . ~ 20 21 R 22 •)<) """" B :2;1 I' 1\ n,·~ ntllt "t. ft . m1n. I .~a. tj :l ,,, :w 21 :.!9.5 •' ('('. I !l. () I 27.0 I 13 !) 00 R 25 03.3 01.!) 14 12 "r, 25 14.3 !)I(.() '" 2!J 10 26 27.0 I(().() ,I "" l·fi 00 R 21 12.0 II --~- \dvnnt·f•. I .onqitudr. Dcg. mm. !ICc. WI Oft 5 h. Ill ill. .'i(f. I 43 2 J. OON HAL'J' ON 'J'JH~ RWt;ET WATJ~ }{ JUYt;R /JrtP·rtnination of latitude .Jlugust 22, 1842-altitude of the sun in the m.e·ridian. )), ,, blo allilu<.lo of the ~un't> lower limh. Oeg. 118 min. OS sec. 05 On ' E ltVATIONS. 'J'ruo central altitud~' . J)r~. mi11. 59 19 Sf C. 10 - ~- --------- -- Deg. miu. MC· 42 26 16 - - -- -------- lndo:l error ·- - 4.0 eoc. 637 [ 174 ] !NCAMPME '1' ON THE :-;wJ~F~T " ' ATf:n llTVf:R, A 'I' HOCK INDBPl'~NDBNC E. Dctn·rninnliun of/ttlilude, .fluglt. l 22, U3tl2-altiturlc of Pnla:r£.~. 0 HS'F. H \' J\'J' JO~ -;, Doublo ultilullt• of Polaris. Timo of chrouomctrr. ·- ----- DeK· nun. sec. h. min. sec. 84 19 :1o 6 >17 37 84 20 50 (.i 50 If> 84 22 LO 6 51 37 81 2:1 :30 6 52 flO 81 24 15 6 54 40 81 25 40 G 56 34 81 27 4G 6 57 49 81 2 40 6 !j!) 15 · 81 2!1 JO 7 00 21( 81 :Jo 10 7 01 41 Hl~::>U L 'l' 0.1<' CALCUI.A'l'ION . Truf' altitud . Deg. mm. src. 42 11 30 Mean tinw. h. min. sec. 8 J (i 33 Latitude. Deg. mm. sec. 42 ~9 36 |