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Show [ 174 J 478 ENCAMPMENT ON 'rilE HJ~A D WATER OF A STREAM. Deterrnination of latitud(', January 24, l 44-altiludcs of Polaris. 0 BSERV AT ION • Doublr altitudrH of Polnris. Timr of chronometer. JJrg. 711/11. 7H ll 79 10 7U 10 79 08 79 0"1 79 07 i9 O(.i 7!) 05 79 05 79 04 True alli l ude. Dcrr. min. sec. 'i9 33 0'2 Sf'(' , ft. 00 'I 00 00 25 :3!; 20 40 15 00 !30 fndex error + 4 sec. Jt)<j ULT 01-' CALCULATION. Yfcnn time. h. oun. src. 7 :ll ~!) CAMP ON A L .\RGl~ ' 'I'IU;AM. min. 8CC. 40 13 1l2 11 43 3G 4!) 03 47 1 :J 48 22 ,19 55 51 18 52 36 r13 5G Latitude. Drg. min. sec. 3li 24 28 Dele'rm'ination of fongitttdc , Jun·ua?'Y 2G, U:H1-attitu.des uf tlte sun. Omml~V A.TlONS. )' I Jl,T S Eltll: "' . Double altiLw)cr:; or lh Time nf chrouomctrr. Double altitudes of the Time of chronometer. sun'H lower litnu. fiun\; lower limh. Deg. min. S(' (', :38 52 00 :·H) 05 50 3!'1 15 :30 :3!.1 25 !10 :l9 :H) 1)0 lt. min. . ~ e c . Drg . fJI/ 1'1 . sec . !) :33 !16. 5 :>u 50 ao :14 :36.1 3U !) 05 :35 12. () 40 07 10 :35 51.0 10 16 :J:) :w 14.2 •10 25 15 h. min. sec. !l :n 23.1 :37 63.0 :38 28.3 :39 01.6 :J9 :36.2 - Tntlt-'x error = + 50 s e. H.ESULT 01~ CALCULA'riON. .. Mean time. . '\.tlvance. Longitude. h. min. sec. !t. nun. sec. ______o ___2 _o_ ___4_ 1----~------u_ ____16 · ___ o_-'.5 _ ___ j_ ____________ _____. 479 [ 174 ] CAMP ON A LARGE ' TRF.AM J)etermination of latitude, Jan. 26 l844-m . · ,". . 1 . ' e? u I an a t ltudes of lite sun. OHSEHVATIONS. Double altitudes of the .A un'~ Jow<"r limb. I Ti lilt' of ('hroumnctrr. Dcg. min. .~rc . I !t. 65 18 50 min. .9fC. 65 19 00 I 0 2:l 41 65 20 15 25 00 65 20 15 , 27 10 66 20 ()() I :28 19 65 19 !)0 I 20 51 65 19 30 I 31 01 6n I I f> 32 3L 65 17 05 :H 03 65 16 1!) I ;)!) 07 :JG 21 Index error = +50 sec. UI<;SUL'r OF CALCULATION. True central altitude. Apparc>nt timr oftnmHit. LatituJc. h. min. sec. 0 28 !)5 Deg. mm. sec. 32 55 20 Det e rmz·n alw· n of lon;ritu.de Jauua'/''1' l)G 1 '4 1 1 · 1 /'. - ' ? . · ,'f ""' ' ' - ( ts anceJ rmn the moon's -- .fu·st tunb to Venus. 0 B. E H VA 'I' IONS \Vl'fJf 'I'll}', C'IHC Ll:. Time of chronomctt'r. Circle readi!H""· ;,, min. G 5 59 7 Ol 02 03 04 06 07 0 09 10 11 12 IJ .~ec. 05 57 20 27 51 !58 15 () tj 17 19 18 26 :H 31 Detr· min. t'c. •> r: v ol RE UL'I' OF CALCULA'JION. True distance. Mean time at Ur cmvid1 • Lolt l{'i tud<·. Deg. 57 ....__ min. 55 .~e(' . 18 ;,, 14 mm. 57 18 8 /){'g. I ~ I 1//l/1 . 1!.1 .vc. .>2 ~-----~------·--~-- ·-------.. |