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Show [ 17tt J 378 ENCAMPMENT ON THB T.8FT DANK <)lo' GlU:t~N RIVER. n t · ti01 .. 0.rz0 nrriturle .flu.,rrust 16, l1 48-altitudes of the sun. !' e1'11UIUI t " './ .:> ' ' • 013 .BHVA'l'ION'. Double altitudes of the 'fimc of chronomc- Double allitutlrs of the Time of chronometer. sun'~:~ lowrr limb. Drg. 18 IS 19 19 19 --- In til. sec. 2R 20 M. 4.0 09 10 32 00 1 60 Mean time. lt. min. sec. 6 09 02 lt. 7 tcr. SUil1H lOWC'l" limiJ. min. sec. De g. min. 18 00.1 20 05 19 17.0 20 18 20 00.0 20 29 21 02.5 20 48 2L 49.2 21 00 Index error ,...., + 1 min. 11 sec. UESULT OF CALCULATION. Advance. !1. milL. sec. 1 12 61. sec. 20 30 20 10 60 "· mm. sec. 7 22 32.3 23 09.4 23 37.7 24: 30.4 25 05.4 Longitude. Determination of longitude, .llugust, 16, 184 3-distances from the second limb oJ the moon to the sun. OBSERVATIONS WIT II THE CIRCLE. Apparent distance. Time of chronometer. lt. ntin. sec. 8 I() 10 Drg. min. sec. 5~ 32 36 50:1 09 4.0 20 03 149 40 00 30 19 60!1 I 40 :n 19 ---- RESULT 01<' CALCULA'riO~ . -- True dil:ltancc. Mean time at Greenwich. Longitudo. Deg. mt,n. sec. !t. min. sec. 108 22 29 2 29 22 • 379 [ 174 J NOON HAT/I' ON GREF:N RrVBH, N8A R TITB OLD TRA DTNn JTOTJSF., WHERE THE ROAD TO 'l'JI J~ COL MBfA LEA VE~ 'l'Jll-; HfVT·:R. Determination of latitude, .11 ug. 1 G, 18 13-rncridi(l.n all iludcs of the sun. OBSERVATION ·. Double alti tudes of th su n's lowl'r limh. Timr of ehronomctcr. De g. min. st;c. h. nun. sec. 12J 18 20 1 06 41 123 20 31 08 30 123 21 00 10 2:3 123 26 00 12 02 12:3 213 50 13 5l 123 27 45 11 56 12::1 27 35 17 19 123 26 15 19 35 123 24 45 21 30 123 23 25 22 48 123 21 20 24- OG --- Index c• ror + 1 min. 12 RCC. RESULT 01:<' CALCULATION. True altitude. Apparent time of transit. Latitude. - ~ Deg. min. sec. lt. min. 8CC. IJrg. min. 62 sec. 00 28 1 12 37 11 46 51 ENCAMPMENT ON DLACK' FORK OF GREEN RIVER. Determination of latitude, .!lugust 17, 1843-altiludes of Pola1·is. OUSERVATION • Double altitudes of Polaris. Time of chronometer. Del(. mm. sec. It. mtn. src. 86 15 10 5 :10 4.5 a. m. 86 14. 30 3G 08 ----·--~------------- Index error = - 30 sec. RE UL'r OF CALCULA'l'lON. True altitude. Mean time. Latituue. - .De~. m-z.n. su. 11 :J7 31 Deg. rnin. sec. 1a 06 15 It. mm. 8t:c. 4 19 52 Determination of longitude, Augu-;!17, -1843-Emersion of Jupiter's first satellite. - Observed time. lt. min. 5 03 sec. 11 a.m . Mean timo. It. min. sec. 3 50 35 I .. ongitude. |