OXli 


~~upon the determin~tion ofthe astronomic~i co-ordinates 

~ of the primary stations at Cheyenne, 'Vyoming Territory,J! and Co lora do Sp ri ngs, C olorado Territory, made during 
-the years 18'72 and 18'73, geographical and geological explorations 
and surveys Wes t 0f t helooth me r i dia n. First lieut. George 

M. Wheeler, corps of engineers, in charge, Dr. F. Kampf and 
J. H. Cl a r k, civilian astronomical assistants. (Wai-""depattment. 
Corps of engineers, U. S. A.) 4. Washington 1874.