U. 8S. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN. 
ist LizuT. GEO. M. WHEELER, Corps or ENGInrers, U, 8. ARMY, IN CHARGE. 
Crmaritomw iit. 
NODTHS 
ECONOMIC BOTANY. 
J. T. ROTHROCK, 
SURGEON AND BOTANIST TO THE EXPEDITIONS OF 1673, 1874, AND 1875. 
