U. S. DEPARTMENT OF AGRICULTURE. 



BUREAU OF PLANT INDUSTRY— BULLETIN NO. 86. 



B. T. GALLOWAY, CJiief of Bureau. 



AGRICULTURE WITHOUT IRRIGATION IN THE 



SAHARA DESERT. 



BY 



THOMAS H. KEARNEY, 

 Physiologist. 



VEGETABLE PATHOLOGICAL AND PHYSIOLOGICAL 

 INVESTIGATIONS. 



Issued November 16, 1905. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 

 1905. 



