XX CONTENTS 



LESSON XII 



PAGE 



TESTING OF FILTERS 



A. Filter-paper. . . . . . . . 136 



B. Berkefeld Filter 136, 137 



C. Effect of Use on a Berkefeld Filter . 137, 138 



PAET III 

 BACTEEIOLOGICAL CHEMISTEY 



LESSON I 



PREPARATION OF METABOLIC PRODUCTS OF MlCRO-ORGANISMS 



(a) Sterilisation by Heat . . . . . . 141 



(b) Sterilisation by Filtration 141 



(c) Sterilisation by Heat and Filtration . . . . 141, 142 



(d) " Intracellular " Poisons . ... . . . 142 



TEST FOR NITROUS ACID IN CULTURES . . . . 143 



LESSON II 



PROTEINES 



(a) Bacillus pyocyaneus . . . ' . . . . 144, 145 



(b) Bacillus prodigiosus . 145 



(c) Precipitation by Alcohol . . . . . .145,146 



BACTERIAL EXTRACTS 146 



