14 



INDEX 



References are to pages 



Endurance and skill im- 

 paired by drink (fig.) . . 

 Enemies, of the bean .... 



of corn 



of lepidoptera 



of man 



Energy, source of, in man . . 



yielded by bean 



English sparrow, attracts 



other birds 



destroys weevils 



eats larvae of Lepidoptera . . 

 permanent resident .... 



scientific name of 



English walnut, protein in . . 

 Enlarged base of onions, stor- 

 age of food in 



Enriching the soil by nitro- 

 gen 



Environment, denned .... 



discussed 



illustrated by development of 



frog 



Enzyme, of gastric juice . . . 



of yeast plant 



secreted by bacteria .... 

 Ephemeridae, an order of 



insects 



Epidemics, of diseases, costli- 

 ness of 



sore throat (fig.) 



Epidermal tissue of pteris 



stem 



Epidermis, of agave, section of 



(fig.) 



of bean root (fig.) 



of leaf (fig.) 272, 



of root 



of rootlets 



of xerophytes, character of . . 



outer layer of skin 



Epiglottis 



Epileptics, number of ... . 

 Epiphytes, definition of . . . 



habitat of 



Epithelium, ciliated (fig.) . . 



columnar (fig.) 



flat (fig.) 



Eskimo, surroundings of . . . 

 Esophagus, of crayfish . . , 



219 

 315 

 316 

 30 

 316 

 1 

 317 



148 

 27 

 31 



141 

 7 



170 



294 



318 



10 



126 



125 

 172 



354 

 345 



20 



255 

 243 



370 



396 

 268 

 274 

 267 

 269 

 396 

 189 

 193 

 257 

 399 

 399 

 189 

 189 

 189 

 127 

 89 



Esophagus, continued 



of earthworm 81 



of frog 116 



of man 167 



Ether, an anesthetic .... 221 



test for oil 266 



Eustachian tube (fig. ) . . . 218 



of frog 114 



of man 166 



Evaporation, prevention of, in 



experiment 295 



Evaporation of perspiration, 



effect of 190 



Evergreen, leaves defined . . 294 



trees, examples of 286 



Evergreens, characteristics of 376 



Evolution, theory of .... 123 



Examples of plant societies 393 

 Excitable temperament, 



heart tracing 228 



Excretion, a life process ... 2 



definition of ...... . 3 



in crayfish 90 



of hydra 65 



of man 206 



of mollusks 97 



Excurrent stem of ever- 

 greens 286, 377 



Exercise, benefits of .... 195 



necessary to keep one fit . . 240 



value of 204 



Exercising, out of doors . .' . 194 



to keep well 351 



Exhalent pores 58 



Exhalent siphon of clam . . 94 



Exoskeleton, of crayfish . . 88 



of grasshopper 15 



of lobster, molted (fig.) ... 87 

 Experiment, to show produc- 

 tion of carbonic acid in plants 275 

 performed on plants .... 403 



Expiration, defined 194 



Explosion of fruit case to 



scatter seeds 312 



Extinct animals, remains of . 125 



Extinct plants, remains of . . 125 



Eye, section of 216 



Eyeball 215 



Eyelid 215 



Eyes, of fish 109 



