CONTENTS. Vii 
CHAPTER VI. 
Tue 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 
cheese — Gluten — Legumin— Pollen — Globulin— Hasmatin 
—Indigestible substances — Epidermic productions — Fibro- 
elastic tissue — Mucin — Pepsin — Urea — Chitine— Cellulose 
— Gun-cotton —Chlorophyll — Fat and oil — Starch — Action 
of the secretion on living seeds —Summary and concluding 
remarks .. 4. 6. 4 ue ew) Pages 85-185 
CHAPTER VII. 
Tue Errects or Sats or 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 .. .. 186-173 
# 
CHAPTER VIII 
Tur 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 
