CONTENTS. XV11 



CHAPTER XVI. 



UNORGANISED FERMENTS. (ENZYMES.) 



Literature. Extraction of enzymes. Comparison of activity of 

 extracts. Experiments 011 diastatic ferments. Preparation of solid 

 diastase. Influence of filtration on diastatic power of extracts. Com- 

 parison of diastatic power of majt and ungerininated barley of leaves 

 of Pisum sativum and Trifolium pratense. Experiments on invertase 

 and glycase. Decomposition of a glucoside (salicin) by an enzyme 

 (synaptase) from another plant .... pp. 3O3 311. 



CHAPTER XVII. 



GENERAL EXPERIMENTS. 



The increase in weight of growing Spirogyra. The influence of in- 

 organic salts on the formation of starch. The changes in the reserve 

 materials of an oily seed during germination under different conditions. 



pp. 312313. 



APPENDIX I. 



Notes on the results likely to be obtained in experiments on metabo- 

 lism pp. 314 322. 



APPENDIX II. 



List of reagents and material required for experiments on meta- 

 bolism pp. 323326. 



