TABLE OF CONTENTS. 
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t 
PART I 
I. INTRODUCTORY 
rAOB 
171 
* 
11. A REVIEW OF THE LITERATURE RELATING TO ICE AS A VEHICLE UF 
DISEASE AND TO THE BACTERIOLOGY OF ICE 472 
A. Infectious Diseases attributed to Polluted Ice and Ice-cream 472 
B. Bacteria in Natural Ice, Snow and Hail, and in Ice-cream 475 
C. Experiments on the Effect of Freezing and other LoW TEMrERAiURES upo!C 
478 
THE Viability of Bacteria 
D. Quantitative Studies upon the Destruction of Bacteria bt Freezing and otiieb 
^""^ 
Low Temperatukes 
IIL EXPERIMENTS BY THE AUTHORS ON THE EFFECT OF COLD UPON THE 
BACILLI OF TYPHOID FEVER 
A. Experiments on the Percentage Reduction of Typhoid Fever Bacilli effected 
BY Freezing for Different Periods of Time 
B. Experiments on the Effect of Alternate Freezing and Thawing up05 the 
Bacilli of Typhoid Fever 
C. Experiments on the Effect of Temperatures slightly above the Freezing- 
Point upon Typhoid Bacilli in Water 
D. Experiments on the Viability of Typhoid Bacilli in Earth at Vakiuus Tem- ^ 
PERATURES 
E, EXPERIMK^T, ON THE EpPECT OP SEmMENTAT.ON ASD CBr^......-™>- »t«.»n THE 
Freezing of Typhoid Fever Bacilli in Water 
IV. DEDUCTIONS FROM THE EXPERIMENTS CONCERNING ICE AS A VEHICLE 
OF INFECTIOUS DISEASE, WITH SPECIAL REFERENCE TO IHE PROB- 
LEMS OF ICE-SUPPLY AND THE PUBLIC HEALTH 
487 
487 
499 
501 
516 
519 
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