TREASURY DEPARTMENT. 
Public Health and Marine-Hospital Service of the United States. 
Walter Wyman, Surg-eon-General. 
HYGIENIC LABORATORY.-BULLETIN No. 11. 
rvl. J. JROSEjMAU. Director. 
February, 1903. 
AN EXPERIMENTAL INVESTIGATION 
OE TRYPANOSOMA LEM ISL 
EDWARD FRANCIS. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
1903. 
