15(1 



VITA. 



The writer was born December 26, 1888 at Baltimore, 

 Maryland. He entered the Baltimore Polytechnic In- 

 stitute in 1903, graduating in 1907. During the 

 year 1908-1909 he taught in the public schools of 

 Baltimore. In 1909, he entered the CJollegiate De- 

 partment of the Johns Hopkins University, receiv- 

 ing the degree of Bachelor of Arts in June, 1913. 

 During the years 1914-191'( , he attended the Johns 

 Hopkins University as a graduate student in Plant 

 Physiology, Physical Chemistry, and Botany. He 

 was engaged in research for the Maryland State 

 Weather Service during the year 1915-1915, and 

 carried on research for the U. S. Forest Service 

 at the Utah Forest Service Sxperiment Station dur- 

 ing the summer of 191c. 



