OFFICE OF EXPERIMENT STATIONS. 
A. C. True, Ph. D., Director. 
E. W. Allen, Ph. D., Assistant Director. 
[rbigation investigations. 
Elwood Mead, ( ' ; 
( !. T. Johnston, Assistant < '/■ 
J. M. Wilson. ■ <j< of Calif ornia Oft 
R. P. Teele, Editorial Assistant. 
Clarence E. Tait. Assistant in Chargi of Maps and Ittustrai 
A. P. Stover. . 
J. D. Stannard, Assistant. 
Frank Adams, Agent and Expert 
Frank Bond, Agent and Expert 
