CONTENTS. VU 



CHAPTER VI. 



The Digestive Power of the Secretion of Drosera. 



The secretion rendered acid by tlie direct and indirect excite- 

 ment of ttie 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 

 cheese — Gluten — Legumin— Pollen — Globulin — Hsematin 

 —Indigestible substances — Epidermic productions — Fibro- 

 elastic tissue — Mucin — Pepsin — Urea — Chit ine — Cellulose 



— Gun-cotton— Chlorophyll — Fat and oil — Starch —Action 

 of the secretion on living seeds — Summary and concluding 

 remarks Pages 85-135 



CHAPTER VII. 



The Effects of 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 174-198 



