CONTENTS. 



I. Critical summary of the literature 219 



II. Method of investigation and sources of errors. . : 222 



A. Method of investigation 222 



B. Sources of errors 226 



III. Results and conclusions, regarding the séries, cultivated on glucose, 



starch r.nd maltose 233 



A. Results 233 



B. Conclusions 248 



IV. Séries cultivated on saccharose, glycérine and lactose 257 



V. Summary 261 



VI. Literature 263 



VII. Tables 266 



