40 



INDEX 



References are to pages 



Temperament, excitable, heart 



tracings of (fig.) 228 



phlegmatic, heart tracings of 



(fig.) 228 



Temperate regions as a 



habitat 161 



of evergreens 381 



Temperature 



of birds 138 



offish 109 



of soil, an element of success 



in agriculture 320 



Tendrils of pea plant (fig.) . . 291 



response of to contact . . . 393 



Tent caterpillar 28 



Tentacles of hydra .... 64 



Terminal bud 288 



cones in relation to .... 379 

 Terrapin, use of as food . . . 131 

 Testa developed from in- 

 tegument 301 



Test for oxygen 8 



Test for weevils 316 



Tests for foodstuffs 265 



in baking and brewing . . . 356 



Thalamencephalon of frog . 120 



Thalessa, larva of 40 



Thallophytes, classified ... 7 

 Thallus of marchantia . . . 367 

 Thick stems for food stor- 

 age 285 



Thick- -walled cells of annual 



ring, how formed .... 290 



Thigmotropism, defined . . 284 



in climbing plants 287 



in roots 284 



Thin- walled cells, when 



formed 377 



Thirty years of diphtheria in 



N. Y. State (fig.) .... 242 



Thistle, a common weed . . . 334 



Thoracic cavity 201 



Thoracic duct 174 



Thorax, of grasshopper ... 13 



Thorn, modified leaf (fig.) . . 293 



Thorns of rose (fig.) .... 329 

 Thousand-legged worms 



(fig.) 92, 93 



Thread-like hairs, of spirilla 



and bacilli 343 



Threads, of bread mold ... 357 

 of spirogyra . . . * . . . . 340 



Throat, cavity of man . . 164, 166 

 of tadpole 122 



Thyme, a member of mint 



family 331 



16 

 43 

 91 



155 



30 

 153 

 263 

 331 



34 



Tibia, of grasshopper . . . 

 Ticks, harmful insects . . . 



members of Araehnida . . 

 Tigers, harmful animals . . 

 Timbers of mines, use of gym- 



nosperms for 384 



Tissue 4, 5 



definition of 268 



Toad, horned (fig.) 129 



Toads, hibernation of .... 123 

 Toadstools, example of fungi . 7 

 Tobacco, aroma of, produced 



by bacteria 345 



effects of use of 226 



inhaling fumes 229 



member of nightshade family . 331 

 Tobacco worm, bearing co- 

 coons of parasite (fig) . . . 

 Toes of cow, rudimentary . . 

 Tomato, a dicotyledon . . . 



food plant of nightshade family 



worms, larvae of sphinx moth , 

 Tongue, a sense organ (fig.) 165, 215 



of man 164 



of snail (fig.) 98 



Toothache, result of poor teeth 167 

 Tortoise, use of as food ... 131 

 Touch, movement caused by . 392 



skin, an organ of 215 



Toxin, bacterial poison . . . 351 



of diphtheria 252 



secreted by bacteria .... 345 

 Trachea, of man 192 



of grasshopper 15 



Trailing arbutus, creeping 



stem of (fig.) 



Transformation of pupa of 

 mourning cloak butterfly 

 into adult (fig.) .... 

 Transient birds, examples of 

 Transpiration, defined . . 



devices for retarding . . . 



experiment to show . . . 



in full grown leaves . . . 



288 



29 

 141 

 274 

 397 

 295 

 291 



