PUERTO RICO AGRICULTURAL EXPERIMENT STATION, MAYAGUEZ 
[Under the supervision of the Office of Experiment Stations, United States Department 
of Agriculture] 
James T. Jardine, Chief, Office of Experiment Stations 
STATION STAFF 
Atherton Lee, Director. 
H. L. Van Volkenberg, Parasitologist. 
R. L. Davis, Agronomist. 
J. O. Carkeko, Assistant Chemist. 
A. Arroyo, Minor Scientific Helper. 
J. Brunet, Minor Scientific Helper. 
A. Diaz, Assistant Field Aide. 
C. Alemar, Jr., Principal Clerk. 
