GEOLOGICAL SURVEY OF THE TERRITORIES. 



813 



SNAKE EIVER DIYISION^. 



List of latitudes determined astronomically. 



Camp 9 43 8 49 



10aucl54 14 17 



11 23 30 



12 35 25 



13 46 31 



14 49 9 



15 57 47 



16 44 54 



17 43 59 57 



18and21 56 1 



19 48 10 



20 45 32 



22 44 4 28 



23 10 34 



24 19 20 



25 22 14 



27 , 37 42 



28 43 28 



29 41 28 



30 38 30 



32 34 25 



33 28 4 



O I II 



Camp 34 44 25 20 



35 20 25 



36 20 37 



37 = 21 12 



38 19 18 



39 14 20 



40 8 00 



41 43 57 50 



42 51 31 



43 46 53 



44 39 44 



45 32 25 



46 29 5 



47 '35 10 



48 44 3 



49 48 57 



50 47 51 



51 39 40 



52 38 28 



53 33 53 



BeiilaLake 44 9 20 



Mount Sheridan 44 15 30 



MAGNETIC VARIATION. 



The magnetic variation was determined by observing- the azimuth of 

 Polaris with a Wurdemau's gradienter, the verniers of which read to 

 single minutes. 



Place of observation. 



Variation 

 east. 



Camp 16, near mouth of Fall River 



20, T^ton Canon, twelve miles west of Mount Haydeu 



23, Bechler's Fork of Fall River , 



24, Henry's Fork, (latitude 44" 19' 20") 



26 



27, Henry's Lake Valley , 



32, Lower Geyser Basin 



33, Upper Geyser Basin , 



36, Shoshone Lake 



39, Lewis Fork, near Lewis Lake 



40, Mouth of Lewis Fork 



Beula Lake . 



Camp 42, foot of Jackson's Lake , 



43, East foot of T6tons , 



44 



45, Snake River, near mouth of Gros Ventres Creek . 



51, Snake River, eight miles below canon 



52 



53, Willow Creek 



54, Highane's Ranch, seven miles from Fort Hall 



July 



July 



Aug. 



Aug. 



Auo-. 



Aug. 



Aug. 



Aug. 



Sept. 



Sept. 



Sept. 



Sept. 



Sept. 



Sept. 



Sept. 



Sept. 



Oct. 



Oct. 



Oct. 



Oct. 



19, 1872 



24, 1872 



4, 1872 



5, 1872 



7, 1872 



8, 1872 



14, 1872 



18, 1872 



7, 1872 



13, 1872 



15, 1872 



17, 1872 



24, 1872 



27, 1872 



28, 1872 



30, 1872 



6, 1872 



7, 1872 



9, 1872 



10, 1872 



18 12 



17 55 



18 15 



18 25 



19 13 

 18-44 

 18 29 

 18 29 

 18 15 

 18 13 

 18 8 

 18 55 

 17 56 

 17 42 



17 

 17 

 17 



38 

 40 

 59 



18 00 

 17 55 

 17 50 



