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Show APPENDIX B.- TABLE OF GEOGRAPHICAL POSITIONS. 301 GEOGRAPHICAL POSITIONS- Continued. I860. No. 37 " 38 " 8ft " 40 " 41 " 42 " 43 « 44 " 45 " 46 " 47 " 48 " 49 « 50 Locumw. Grow Creek, one and a half miles below the kanyon. Branch of Lodge Pole Creek, in Cheyenne Pass. Chug- water Riyer; Bridgets ravine.... North Platte River; left bank, below mouth of Horse Creek. Scott's Bluffs Left bank of Platte River Left bank of Platte River Oak Grove; Little Blue River Fort Leavenworth, according to the determinations of Major Emory and M. Nicollet. Latitude. 41° 09' 08". 5 41° 21' 45". 7 41° 45' 35". 8 41° 89' 68". 4 42° 12' 88". 2 41° 66' 86". 7 41° 48' 25". 7 41° 45' 39" 41° 88' 22" 41° 17' 18". 7 40° 88' 46" 40° 13' 41". 2 40° 11' 16" 39° 21' 14" Longitude we* t of Greenwich. 105° 08' 24" 106° 12' 21" 1 104° 69' 25" 104° 66' 45" 104° 81' 26" 103° 68' 23" 103° 45' 02" 103° 21' 44" 102° 45' 10" 102° 02' 28" 98° 68' 11" 97° 64' 86" 97° 39' 02" 94° 44' 00" REMARKS. The longitudes given in the table depend upon those assumed for Fort Leavenworth, and a point in Great Salt Lake Valley, taken from Nicollet and Fremont. Their means for fixing these points were BO superior to ours that they are necessarily adopted; our sextants being imperfect, and the mode of transporting chronometers, of the kind furnished, interfering with their regularity. On leaving Fort Leavenworth, the two chronometers differed but 8.5 seconds; they were put into leather boxes, carefully adjusted upon two mounted men, and at the end of the first six miles differed 11 minutes and 11 seconds. From subsequent observations the loss was attributed to No. 1961. They were then carried in a spring- wagon with the other instruments. The average daily difference for the entire route was a little above one second. The relative rate was, for sixteen days, a losing one of half a second; then, to Laramie, one and a half second's gain. Thence they were carried in another light wagon, and the rate was about one second. Whatever important changes one received, was therefore partaken by the other. |
