TREASURY DEPARTMENT 
Public Health and Marine-Hospital Service of the United States 
HYGIENIC LABORATORY.— BULLETIN NO. 52 
October, 1909 
Xo. 3 
ON 
THE ORIGIN AND PREVALENCE OF TYPHOID 
FEVER IN THE DISTRICT OF COLUMBIA 
( 1908 ) 
By 
Nl. J. ROSEXAlLI, l. l. ltjnisdex 
arrci JOSERLT PP. KASTLE 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1909 
