
Issued November 7, 1911. 
ORTO RICO AGRICULTURAL EXPERIMENT STATION, 
en D. W. MAY, Special Agent in Charge. 
Mayaguez, May, frorI. 
Bulletin No. 11. 
BY 
P. L, GILE, 
CHEMIST. 
UNDER THE SUPERVISION OF 
OFFICE OF EXPERIMENT STATIONS, 
U. 8S. DEPARTMENT OF AGRICULTURE. 
WASHINGTON: 
- GOVERNMENT PRINTING OFFICE, 
1911. 
_ Monograph 

