4 
CONTENTS. 
III. Ice — C ontinued. Page. 
Laboratory examinations of ice and the waters from which ice is 
manufactured 101 
Bacteriological summary of ice examinations 102 
Bacteriological and chemical examinations of wells and springs 
used by the ice factories 103 
Bacteriological and chemical examinations of ice 106 
The effect of freezing upon the t>y>hoid bacillus 91 
IV. Waters of public wells axd springs and their relation to typhoid 
FEVER 113 . 
Introduction 115 
The deep wells 116 
Summaiy 116 
Northwest section 117 
Northeast section 119 
Southwest section. 121 
Southeast section 122 
Bacteriology of the deep wells in the District of Columbia 123 
The shallow wells 125 
Summary 128 
Northwest section 128 
Northeast section 136 
Southwest section 139 
Southeast section 140 
Bacteriology of the shallow wells in the District of Columbia. . 145 
" V. SaNIT.IRY inspection of the table waters vended in W-JlSHINGTON, 
D. C. By Joseph Goldberger 151 
Introduction and summary 153 
Details of inspection 153 
Table showing the results of chemical and bacteriological examina- 
tions of table waters vended in Washington 163 
VI. Typhoid “b.\cillus carriers.” By Joseph Goldberger 165 
Introduction 167 
Review of literature 169 
Table showing frequency of t\q)hoid bacilluria 172 
Bibliography 173 
VII. The longevity of B. typhosus outside the human body. By A. M. 
Stimson 175 
VIII. The alleged role of intestinal worms as inoculating agents in 
TYPHOID FEVER. By Ch. Wardell Stiles 193 
Introduction 196 
Historical review 198 
Investigations in the Washington epidemic 206 
Technique 206 
Acknowledgments 207 
Species of parasites found in the stools 207 
Concurrent infections. 207 
Frequency of infections 207 
Endemic helminthiasis 207 
Severity of helminthic infection. 210 
Tjqihoid and whipworm infection compared indhectly 210 
In respect to age of patient 210 
In respect to sex of patient 212 
In respect to race of patient 212 
Bibliography 214 
