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Show [ 174 J ENCAMPMENT ON DEAH lUVEH, EAR ITS MOUTH. Deterntination of latitude, Sept. 2, 18,13-altitudcs of Polaris. • OB Ell.VATIONS. Douhle altitudcH of Polnri!';. Timo of chronometer. Dtg. mir1. S('C. h. min. sec. 3 25 10 10 01 15 :3 26 10 02 58 3 '27 .')0 03 58 3 28 20 05 13 3 29 20 06 19 Index error = - 30 Rcc . RESULT 01<' CALCULATION. True altitulle. Deg. min. sec. 41 42 23 Mean time. ft. min. sec. 8 52 ;l4 Latitude. De~. min. sec. 41 30 27 Determination of longitude, St>pt. 2, 18 13-altitudes of o. .!lndromedre. OB ERVATIONS. - --- -------------------------- FlliST Sf:na;s. S I>COND SEill'£8. Double altitudes of a Time of chronometer. Double altitudes of a Time of chronomerer. Andromcdro. eg. 9 so 80 - ----· 1nt1). sec. 37 40 I!) 10 43 40 Mean J.imc. h. mw. sec . 9 15 39 h,, 10 Antlromedro. min. 21 25 21 sec. 0<1.0 5:3.5 03.0 Dr g. 81 8 1 81 min. 0 31 48 Index error = + 1 min. 25 sec. RESVLT OF CALCULATION. Advant:c. h. min. sec. 1 ll 3().4 sec. 20 10 20 !L. 10 min. sec. 28 06.0 29 06.5 29 52.6 - Longitude. - 395 • ENUAMPMENT ON BEAR HIVEH, NI·;.\H ITS MOUTH. netennination of latitude, Srpt. 2 1 \3-merirlian altitudes oJ o../lquila;. 0 B~ .E H. VA '!'IONS. - - Time of chrouomett•r. Dcg. min. sec. llll;:3J 55!6) 2500 1"0· m1i1n . S1f5'C . Hi l:l ll3 55 10 17 32 113 5:1 20 19 00 ll3 50 -10 20 1 I nJex error - - 30 sec. HESULT OF CALCULATION. True altitude. Apparent time t)f transit. Latitude. D~. 111 in. sec. ''· 1/llll. scr.. 57 00 3 10 08 11 Determination of longitude, Septernbn· 2, l 43-emersion of' Jupiter's thi,rd satellite. Observed time. lt. 1111 n. sec. 10 51 56 Mean time. lt. min. sec. 9 43 14 Enze'rsion of Jupiter's fourth satellite. Observed time. Mean time. -~- / ~· lt. rntn. sec. 11 03 29 min. ser. 51 47 En1,ersion of Jupiter's second satellite. Observed time. Mean time. --lt. min. sf' c. ft. m1'n. sec. 12 00 17 10 48 36.5 Longitude. Longitude. Langitutlc. |
