Report of the exploring expedition to the Rocky Mountains in the year 1842, and to Oregon and north California in the years 1843-44 . 07 09 10 12 13 Deg. min. 0G 1057 22 0056 48 5055 47 4055 18 30 h. 7777 7 min. sec. 17 18 23 24 Index error = — 22 OF CALCULATION. Mean time. Retard. Longitude. h. min. 37 06 h. 21 Determination of time, August 23, 1842—altitude of the sun. OBSERVATIONS. FIRST SERIES. SECOND SERIES. Double altitude of thelower limb of the sun. Time of chronometer. Double altitude of
Report of the exploring expedition to the Rocky Mountains in the year 1842, and to Oregon and north California in the years 1843-44 . 07 09 10 12 13 Deg. min. 0G 1057 22 0056 48 5055 47 4055 18 30 h. 7777 7 min. sec. 17 18 23 24 Index error = — 22 OF CALCULATION. Mean time. Retard. Longitude. h. min. 37 06 h. 21 Determination of time, August 23, 1842—altitude of the sun. OBSERVATIONS. FIRST SERIES. SECOND SERIES. Double altitude of thelower limb of the sun. Time of chronometer. Double altitude of thelower limb of the sun. Time of chronometer. Deg. min. 18 3532 34 10 32 40 30 33 00 3033 15 20 Deg. min. 35 5033 48 35 33 58 25 34 08 3034 35 30 639 [ 174 ] ENCAMPMENT ON THE NORTH FORK OF PLATTE RIVER, MOUTH OF SWEET WATER RIVER. Determination of time, August 23, 1842—altitude of the sun. OBSERVATIONS. FIHST SERIES Double altitude of thesuns lower limb. Deg. min. sec. 44 21 05 43 55 50 43 43 30 43 30 50 43 17 30. SECOND SERIES. Double altitude of thesuns lower limb. Deg. min. sec 43 01 30 52 10 39 55 27 30 13 50 42424242 Time of chronometer. k- 23 23242425 Index error = — 22 OP CALCULATION. Mean time. Retard. Longitude. h. min. 45 24 h. min. 22 35 Determination of latitude, August 23, 1842—altitude of Polaris. OBSERVATIONS. Double altitude of Polaris. Time of chronometer. Deg. min. sec. h. min. sec. 84 20 00 6 49 55 84 21 30 6 52 20 84 22 15 6 53 04 84 24 20 6 55 14 84 25 20 6 56 32 84 26 30- 6 57 56 84 28 10 6 59 28 84 28 25 7 00 59 84 30 20 7 02 29 84 31 10 7 04 13 RESULT OF CALCULATION. True altitude. Mean time. Latitude. Deg. min. 12 50 h. min. 22 08 Deg. min. 27 18 [ 174 ] 640 ENCAMPMENT ON THE NORTH FORK OF PLATTE RIVER, MOLTH OF SWEET WATER RIVER. Determination oflongitude, Augu
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Keywords: ., bookauthorunitedstatesarmycorps, bookcentury1800, bookdecade1840
