CONTENTS 



LESSON XIT 



PAOE 



TESTING OF FILTERS 



A. Filter-paper 136 



B. Berkefeld Filter 136, 137 



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



PAET III 

 BACTERIOLOGICAL CHEMISTRY 



LESSON I 



PREPARATION OF METABOLIC PRODUCTS OF MICRO-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 



