xvni CONTENTS 



PAGE 



(2) Bacterium coli commune 106 



(3) Streptococcus pyogenes . . . . . . 106 



(4) Bacillus diphtherias 106 



(5) Bacillus tuberculosis (Van Ketel's Method) . . 107, 108 



LESSON VII 



EXAMINATION OF Am AND DUST 



I. Plate Culture Method 109 



II. Aspiration through Broth . . . . . 110 

 III. Filtration through Sugar 110, 111 



LESSON VIII 



EXAMINATION OF AIR AND DUST (concluded] 



IV. Anaerobic Germs in Air and Dust .... 113-115 

 EXAMINATION OF SOIL 



A. Surface Soil 



(a) Aerobic Germs 115 



(b) Anaerobic Germs 115, 116 



B. Tetanus and Malignant (Edema Bacilli 



(a) Growth in an Exhausted Flask . . . . 116 



(b) Growth in Hydrogen 116-118 



(c) Fractional Separation of Tetanus Bacilli . . . 118, 119 



LESSON IX 



EXAMINATION OF DECOMPOSING MEAT 

 A. Putrefaction 



(a) Aerobic Putrefaction .... . 120 



(b} Anaerobic Putrefaction .... 120, 121 



(c) Sterilisation and Putrefaction .... 121-122 



