V. 
I. EXPERIMENTS ON THE EFFECT OF FREEZING AND OTHER LOW 
TEMPERATURES UPON THE VIABILITY OF THE BACILLUS OF 
• TYPHOID FEVER, WITH CONSIDERATIONS REGARDING ICE AS 
A VEHICLE OF INFECTIOUS DISEASE. 
H. STATISTICAL STUDIES ON THE SEASONAL PREVALENCE 
01 
TYPHOID FEVER IN VARIOUS COUNTRIES AND ITS KKLATJON ^ 
TO SEASONAL TEMPERATURE. 
BY 
WILLIAM T. SEDGWICK, Ph.D., and CHARLES-EDWARD A. WINSLOW, S. M., 
Professor of Biology^ 
Listruclor in Biology^ 
In the Massachusetts Institute of Technology, 
BOSTON, MASSACHUSETTS, 
WITH EIGHT PLATES. 
Presented March 12, 1902. 
(Preliminary Comnmuication, December 13, 1899) 
J 
