PART FOURTH. 



SAPROPHYTES. 



I. BACTERIA IN THE AIR. II. BACTERIA IN WATER. III. BACTERIA IN 

 THE SOIL. IV. BACTERIA ON THE SURFACE OF THE BODY AND OF EX- 

 POSED Mucous MEMBRANES. V. BACTERIA OF THE STOMACH AND 

 INTESTINE. VI. BACTERIA OF CADAVERS AND OF PUTREFYING 

 MATERIAL FROM VARIOUS SOURCES. VII. BACTERIA IN AR- 

 TICLES OF FOOD. VIII. NON-PATHOGENIC MICROCOCCI. 

 IX. NON-PATHOGENIC BACILLI. X. NON-PATHO- 

 GENIC SPIRILLA. XI. LEPTOTRICHE^E AND 

 CLADOTRICHE^E. XII. ADDITIONAL SPE- 

 CIES OF BACTERIA NOT CLASSIFIED. 

 XIII. BACTERIOLOGICAL DIAGNOSIS. 



