CONTENTS 



XV 



ClIAl'. 



XXIX. 



OVERSEAS TRANSPORT. ALIMENTARY CANAL 



General. 413. Mouth. 413-415 : Functions of Saliva, 

 Muscles ol' Tonpue, 414 ; Act of Swallowinp;, 41.5. The 

 Stomach, 416 418 : Cardiac and Pre-pyloric Sphincters, 

 417 ; Pyloric Sphincter, 418. The Intestines, 418-419 : 

 Faeces, 419 ; Secretion of Acid and Alkaline Juices, 

 420. 



XXX. MOVEMENTS OF THE LIMBS 



Levers, 423. Pulleys, 425. Centre of Gravity, 426. 

 Standing, Bending and Walking, 427-428. 



PAGE 



413 



422 



XXXI. 



XXXII. 



SECTION V: THE ANIMAL AS A WHOLE 



THE PRESERVATION OF NEUTRALITY 



Factors Tending to Preserve Neutrality, 430. Alkali 

 Reserve, 431, Part Played by Erythrocytes, 433. 



XXXIII. TROPISMS— THE SLAVES OF THE LAMP . 



Heliotropism, 455. Talbot's Law, 457. Heliotropic 



" Dog," 458. Geotropism, Stereotropisni and Chemo- 



tropism, 459. Galvanotropism, Orientation in Space, 

 460. 



429 



THE REGULATION OF TEMPERATURE . . 435 



Instruments used to Indicate Animal Temperature, 

 436. Radiation, 439. Conduction, 440. Table of 

 Thermal Conductivities. 441. Temjierature Gradient, 

 442. Evaporation of Moisture, 443. Katathermo- 

 meter, 446. Physical Processes involved in the Regula- 

 tion of Temperature, 448. Chemical Processes, 449. 

 Heat Centre, 450. Ventilation, 450. Clothes, 451. 



455 



462 



466 



XXXIV. ADAPTATION 



Survival of Fittest, 462. Nature of Engrams, 463. 

 Various Influences from Environment, 464. 



XXXV. GROWTH 



Nature of the Phenomenon, 466. " Free " and 

 " Bound " Water, 467. Normal Rate of Growth, 468. 

 " Expected " Weight and " Calculated " Length, 469. 

 Centimetre Index, 470. Factors Modifying Growth : 



(1) Phase Differences, 472 ; Sex and Race, 473 ; 



(2) External Factors, 473 ; Seasonal Variations, 474 ; 

 Nutrition, 475 ; Energetics of Growth, 476. Rubner's 

 Law of Constant Energy Consumption, 477. Growth 

 and Form, 478. Bohn's Laws, 479. 



XXXVI. DEVELOPMENT 480 



Cell Division, 480. Fields of Force, 481. Cause of Cell 

 Division, 483. Maturation of Germ Cells, 485. Ferti- 

 lisation, 486. Artificial Parthenogenesis : (1) Mem- 



