plants.
CHAPTER IV.
THE EFFECTS OF HEAT ON THE LEAVES.
Nature of the experiments Effects of boiling water Warm water causes
rapid inflection Water at a higher temperature does not cause
immediate inflection, but does not kill the leaves, as shown by their
subsequent re-expansion and by the aggregation of the protoplasm A
still higher temperature kills the leaves and coagulates the albuminous
contents of the glands.
CHAPTER V.
THE EFFECTS OF NON-NITROGENOUS AND NITROGENOUS ORGANIC FLUIDS ON THE
LEAVES.
Non-nitrogenous fluids Solutions of gum arabic Sugar Starch Diluted
alcohol Olive oil Infusion and decoction of tea Nitrogenous
fluids Milk Urine Liquid albumen Infusion of raw meat Impure
mucus Saliva Solution of isinglass Difference in the action of these
two sets of fluids Decoction of green peas Decoction and infusion of
cabbage Decoction of grass leaves.
CHAPTER VI.
THE DIGESTIVE POWER OF THE SECRETION OF DROSERA.
The secretion rendered acid by the direct and indirect excitement 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 Haematin 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.
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
3