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 — Hematin 
—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 
yemarks ..) .. «oe ue ee 0) ~~) Pages 85-185 
CHAPTER VII. 
Tur Errects or Sats 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 .. .. 186-173 
CHAPTER VIII. 
Tne Errects 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 
