INDEX 



HI 



Suffocation, 182. 

 Sugar, 53, 60; 



absorption, 158; 



digestion, 157; 



food preservative, 344 ; 



fuel value, 119-120; 



test for, 59. 

 Sugar cane, 324. 

 Summer complaint, 285. 

 Sun a source of energy, 79. 

 Sundew, 92. 

 Sunlight, necessarv for starch making, 



82. 

 Suprarenals, 167. 

 Sweat gland, 189. 

 Swim bladder of fish, 245. 

 Symbiosis, 105. 

 Synapse, 198. 

 SyphiHs, 282, 410. 

 Systemic circulation, 170. 



Tactile corpuscles, 202. 

 Tadpole, 230, 231. 

 Tapeworm, 240, 287, 288. 

 Taste, sense of, 202, 203. 

 Tea, stimulant, 139. 

 Teeth, 150, 151 ; 



care of, 151-152, 311. 

 Teleost, Teleostei, 245, 246. 

 Temperature, influence on living 

 things, 17; 



of the body, 189; 



sense of, 202. 

 Terrapin, 352. 

 Testes, 167. 

 Tests, for carbon dioxide, 11; 



for nutrients, 54, 55, 59. 

 Tetanus, 266, 273, 274. 

 Thallophytes, 235. 

 Thermotropism, 17. 

 Thinking, 201. 

 Thoracic duct, 158, 174. 

 Thorax, of insect, 25. 

 Throat, diseases of, 181-182. 

 Thrombin, 165. 

 Thymus gland, 167. 

 Thyroid gland, 166. 

 Tick fever, 283. 

 Tissue, 47. 

 Tissue building, 120. 



Toad, 358. 



Tobacco, effects of, 142. 



Tobacco crop, 332. 



Tomatoes, value as food, 123. 



Tongue, 150. 



Tonsils, enlarged, 182, 310. 



Touch, sense of, 202. 



Tourniquet, 175. 



Toxin-antitoxin treatment, 273. 



Toxins, 260, 261, 271, 272. 



Trachea, 150. 



Tradescantia leaves, 81. 



Transfusion of blood, 166. 



Transpiration, 77-79. 



Trees, 313-321; 



injured by insects, 363, 364; 



see Forests. 

 Trial and error method, 195, 196. ' 

 Triangle of life, 395. 

 Trichina, 240, 288. 

 Trichinosis, 288. 

 Trillium, 237. 

 Tropics, jungle, 17, 18. 

 Tropisms, 15-17, 192-195; 



value, 17. 

 Trout, development of, 372. 

 Trypanosomes, 283. 

 Trj^psin, 155. 

 Tsetse fly, 283. 

 Tuberculosis, 262, 263, 270, 285 ; 



carried by milk, 301 ; 



fought by health boards, 309 ; 



recurrence in same houses, 293, 294. 

 Turnip, 325. 

 Turtle, 246, 352. 

 Tussock moth, 364, 

 Tympanic membrane, 204. 

 Tyndall, Professor, biologist, 406. 

 Typhoid fever, 264, 285; 



carried by milk, 301 ; 



carried by water supply, 303-305 ; 



vaccination against, 275 ; 



Widal test, 165, 275. 

 Typhus fever, 283. 



Ungulata, 249. 

 Unit characters, 388. 

 Urine, excretion, 188. 

 Urodela, 246. 

 Uterus, 232. 



