CONTENTS. XV 



CHAPTER XVI. 



UNORGANISED FERMENTS. (ENZYMES.) 



Literature. Extraction of enzymes. Comparison of activity of 

 extracts. Experiments on diastatio ferments. Preparation of solid 

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

 parison of diastatio power of malt and ungerminated barley — of leaves 

 of Pisuvi sativum and Trifolium pratense. Experiments on iuvertase 

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

 (synaptase) from another plant .... pp. 285—293. 



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. 294 — 295. 



APPENDIX I. 



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

 lism pp. 296 — 304. 



APPENDIX II. 



List of reagents and material required for experiments on meta- 

 bolism . . pp. 305 — 30Q. 



