Xvi VEGETABLE PHYSIOLOGY 
PAGE 
absorption by chlorophyll; absorption of heat rays—Fixation of 
energy—Kinetic and potential energy—Distribution and liberation 
of energy—Dependence of the plant upon oxygen; absorption of 
oxygen and exhalation of carbon dioxide; apparatus to demon- 
strate these processes—Loss of weight during respiration—Varia- 
tions in the respiratory activity—Relation between the absorption 
of oxygen and the exhalation of carbon dioxide; the respiratory 
quotient—Exhalation of water during respiration—Respiration a 
function of protoplasm—Conditions affecting respiration ; tempera- 
ture, light, differences of gaseous pressure and of nutritive 
materials—Relation of respiratory processes to local utilisation of 
potential energy—Oxidative actions other than respiration—Intra- 
molecular or anaérobic respiration—Fermentation—Anaérobic 
plants. . ‘ . . . . . ‘ . 281-309 
CHAPTER XIX 
GROWTH 
Relation of growth to constructive metabolism—Definition of growth 
—Distribution of growth—Conditions necessary for growth ; plastic 
materials, turgescence, temperature, oxygen—The grand period of 
growth—Growth of a cell and of a multicellular organ—The region 
of growth in the latter—Daily period of growth in length—The 
Auxanometer—Variations in growth; hyponasty and epinasty ; 
nutation and circumnutation—Tensions accompanying growth— 
Rectipetality ‘ ‘ . : 7 t : . 310-324 
CHAPTER XX 
TEMPERATURE AND ITS CONDITIONS 
Range of temperature through which the vital processes proceed ; 
photosynthesis, germination—Causes and effects of fluctuations of 
temperature—Influence of the light rays on temperature ; impor- 
tance of anthocyan—Absorption of heat by conduction—Dissipa- 
tion of heat in evaporation of water—Radiation—Nyctitropic 
movements—Loss and gain of heat by conduction—Regulation of 
heat—Power of resistance to extremes of temperature « 325-335 
CHAPTER XXI 
INFLUENCE OF THE ENVIRONMENT ON PLANTS 
Characters of aquatic plants; influence of a watery environment on 
structure—Xerophytes and their peculiarities—Alpine plants— 
Epiphytes—Parasites—Insectivorous p'ants : 5 . 336-351 
