GEOLOGICAL SUEVEY OF THE TERRITORIES. 



813 



SNAKE EIVEE DIVISION. * 



List of latitudes determined astronomically. 



Camp 9 43 8 49 



10and54 14 17 



11 23 30 



12 35 25 



13 46 31 



14 49 9 



15 57 47 



16 44 54 



17 43 59 57 



18 and 21 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 



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 



Benla Lake '. V... '. .' .' .' .' .' ." ...... '. '. 44 9 20 



Mount Sheridan 44 15 30 



MAGNETIC VARIATION. 



The magnetic variation was determined by observing the azimuth of 

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

 single minutes. 



Place of observation. 



Variation 

 east. 



Camp 16, near moutli of Fall River 



20, T6ton Canon, twelve miles west of Mount Hayden 



23, Bechler's Fork of Fall River , 



^, 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 T6ton8 



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. 



Aus^. 



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 38 

 17 40 



17 59 



18 00 

 17 55 

 17 50 



