CONTENTS. Vll 



CHAPTER VI. 



THE DIGESTIVE POWER OF THE SECRETION OF DROSERA. 



The secretion rendered acid by the direct and indirect excite- 

 ment of the glands Nature of the acid Digestible 

 substances Albumen, its digestion arrested by alkalies, 

 recommences by the addition of an acid Meat Fibrin 

 Syntonin Areolar tissue Cartilage Fibro-cartilage 

 Bone Enamel and dentine Phosphate of lime Fibrous 

 basis of bone Gelatine Chondrin Milk, casein and 

 c } ieese _ Gluten Legumin Pollen Globulin Hsematin 

 Indigestible substances Epidermic productions Fibro- 

 elastic tissue Mucin Pepsin Urea Chit ine Gel luloso 

 Gun-cotton Chlorophyll Fat and oil Starch Action 

 of the secretion on living seeds Summary and concluding- 

 remarks Pages 85-13,' 



i 



CHAPTER VII. 



THE EFFECTS OP SALTS OF AMMONIA. 



Manner of performing the experiments Action of distilled 

 water in comparison with the solutions Carbonate of 

 ammonia, absorbed by the roots The vapour absorbed by 

 the glands Drops on the disc Minute drops applied to 

 separate glands Leaves immersed in weak solutions - 

 Minuteness of the doses which induce aggregation of the 

 protoplasm Nitrate of ammonia, analogous experiments 

 with Phosphate of ammonia, analogous experiments with 

 Other salts of ammonia Summary and concluding 

 remarks on the action of salts of ammonia .. .. 136-173 



CHAPTER VIII. 



THE EFFECTS OF VARIOUS OTHER SALTS, AND ACIDS, ON THE 



LEAVES. 



Salts of sodium, potassium, and other alkaline, earthy, and 

 metallic salts Summary on the action of these salts - 

 Various acids Summary on their action .. .. 174-1'JS 



