Xiv 
VEGETABLE PHYSIOLOGY 
Relationship between the plastid and the colouring matter—Leuco- 
plasts—Conditions of formation of chlorophyll; light, temperature, 
iron—Formation of carbohydrates by chloroplasts ; conditions of 
their activity—Theories of photosynthesis—Relation of starch to 
the process—Rays of light made use of in photosynthesis ; researches 
of Engelmann, of Tmiriazeffi—Inhibition of the chlorophyll appara- 
PAGR 
tus—Formation of organic substance in its absence . . 146-164 
CHAPTER XI 
THE CONSTRUCTION OF PROTEINS 
Complexity of the composition of protein ; its percentage composition 
—Classification of proteins; albumins, globulins, metaproteins, 
proteoses, peptones, proteins soluble in alcohol—Synthesis of 
proteins in plants; various i aacimaria of protein con- 
struction in the plant ‘i . 
CHAPTER XII 
THE CONSTITUENTS OF THE ASH OF PLANTS 
Nature and composition of the ash—Water-culture and the limitations 
of its usefulness in the study of the ash—Classification of the 
constituents of the ash—The selective power of plants—Sulphur 
and phosphorus—Potassium, magnesium, calcium, iron—Sodium, 
silicon, chlorine, bromine, iodine, manganese—Accidental con- 
stituents of the ash—Relation of nitrogen and potassium to herbage 
plants . . ‘i . 
CHAPIER XIII 
OTHER METHODS OF OBTAINING FOOD 
Partial or entire absence of the constructive power—Nutrition of 
saprophytes —Insectivorous plants— Utricularia—The pitcher- 
plants—Drosophyllum — Pinguicula — Dionea — Drosera — 
Digestion of substances by Fungi—Commensalism—Symbiosis— 
Mycorhiza—Root parasites—Parasitism among green plants and 
Fungi. 5 , . 
CHAPTER XIV 
TRANSLOCATION OF NUTRITIVE MATERIALS 
Conditions of the constructive processes; surplus production and 
storage—Necessity of circulation of food material in consequence 
of localisation of construction, and intermittence of oonsumption— 
. . . . 165-175 
. . . . . 176-188 
. . ‘ . 189-212 
