U. S. DEPARTMENT OF AGRICULTURE. 

 BUREAU OF PLANT INDUSTRY — BULLETIN NO. 188. 



B. T. GALLOWAY, Chief of Bureau. 



DRY FARMING IN RELATION TO RAINFALL 

 AND EVAPORATION. 



BY 



LYMAN J. BRIGGS, 

 Physicist in Charge of Physical Investigations, 



AND 



J. O. BELZ, 

 Assistant in Physical Investigations. 



Issued November 5, 1910. 



WASHINGTON: 

 government printing office, 

 1910, 



V 



