THE JOURNAL 



OF 



THE DEPARTMENT OF AGRICULTURE 



OF 



PORTO RICO 



A Quarterly Journal containing scientific contributions from the mem- 

 bers of the Staff of the Insular Experiment Station, Rio Piedras, P. R. 

 Four numbers constitute a volume, issued in January, April, July, and Octo- 

 ber. Offered in exchange for bulletins and other publications of the experi- 

 ment stations and Federal Government, and for agricultural, horticultural, 

 bottanical, and entomological journals, reports, or other similar publications. 

 Sent free to all residents of Porto Rico upon request. 



JOHN A. STEVENSON, EDITOR, 



(Chief, Division op Botany and Plant Pathology.) 

 {Insular Experiment Station, • ■ Bio Piedras, Porto Rico.) 



SAN JUAN, P, R. 



Bl'EKAU OF SUPPLIIS, PRINTING, AND TRANSPORTATION 



1918 



