OXli 


Pro g res s -R e po r t upon geographical and geological ex p 1 0 ration s 

~IJ. 
(!JO 
and surveys West of the looth meridian, in 1872, under 
the direction of brig. gen. A. A. H u m p h r e y s, chief of engineers, 
U. S. A., by first lieut. George M. Wh e eIe r, corps of engineers, 
in charge. (Engineer department, U. S. A.) (Mit I Karte und 5 Taf.) 
4. Washington 1874.