16 
CONTENTS 
CHAPTER XXV 
Malaria. The Typhus Fever. 
Malaria, 190; Typhus Fever, 190. 
CHAPTER XXVI 
The Higher Bacteria. The Yeasts. The Molds . 
The Higher Bacteria, 192; Streptothrix, 192; Actinomy¬ 
cosis, 192; The Yeasts, 192; The Molds, 193. 
SECTION III 
CHAPTER XXVII 
Diseases of Unknown Causation. 
Smallpox, 194; Measles, 194; Mumps, 194; Scarlet Fever, 
194; Trachoma, 195; Infantile Paralysis, 195; Yellow 
Fever, 195; Dengue, 196; Rocky Mountain Spotted Fever, 
196; Foot and Mouth Diseases, 196; Hydrophobia, or 
Rabies, 196. 
CHAPTER XXVIII 
Bacteria in Soil, Air, Water, and Milk. 
Microorganisms of the Soil, 197; Microorganisms of the 
Water, 198; Bacteria of the Air, 201; Bacteria of Milk, 
202 . 
CHAPTER XXIX 
General Care of the Laboratory . 
CHAPTER XXX 
List of Questions. 
PAGE 
190 
192 
194 
197 
203 
204 
