TREAvSURV DEPARTMENT. 
Public Health and Marine-Hospital Service of the United States. 
Walter Wyman, Surgrcon-General. 
HYGIENIC LABORATORY.— BULLETIN No. lo. 
M. J. WOiSKXA.IT, l^ireotor. 
February, 1903. 
REPORT 
UPON THE 
Prevalence and Ceogradiiic Distrihiitkix of Hookworm Disease 
i^Uncinarinsis or Anchylostomiasis^ 
IN THE 
UNITED STAl'ES. 
CH. WARDELL STILES, Ph. I). 
Chief of Divisio)i of Zoology. 
WASH IN ('.TON: 
GOVKRNMEN'P I'KINI'IN*; OFFICE. 
I 903. 
