368 



CIVIC BIOLOGY 



Dahlia, 86 



Dandelion, 72 



Dandruff, 236 



Darwin, Charles, 330, 331, 333, 338 



Datura stramonium, 72, 75 



Death-cup mushroom, 76 



Death-of-man, 75 



Deer, 169, 171, 172, 261, 263 



Deer farming, 172 



Deer flies, 113 



Delaware grape, 85 



Devilfishes, 274 



Devil's apple, 75 



Devil's-bite, 76 



Diamond-backed terrapin, 324 



Diarrhea, 232, 233, 234 



Diphtheria, 177, 232, 234, 235, 236, 

 239, 243, 245, 246, 248, 250, 251 



Diptera, 153, 155 



Discoverers, biological, 359-362 ; 

 present-day, 359 



Discovery, history of, 358, 359 ; im- 

 portance of, 357-358; kinds of, 

 356, 357 ; progress in, 355-362 



Distemper, 248 



Dock, 72 



Dodder, 188 



Dodo, 42, 43 



Dog, 165, 182, 257, 263 ; influenced 

 by alcohol, 341 ; itch mite of , 166 ; 

 as a transmitter of rabies, 256 



Dog tick, 168 



Dogwood, 75 



Dourine, 259 



Doves, 34, 42, 43 



Downy woodpecker, 6, 46 



Dragon flies, 129, 153 ; nymphs of, 

 as enemies to young mosquitoes, 

 131 



Drop, a disease of lettuce, 210 



Drug plants, 72 



Drug-store beetles, 155 



Dry rot, or stem blight. 216 



Duck, 38 ; attacked by rats, 174 

 Duck hawk, 45 

 Duck potato, or wapata, 307 

 Duckineat (Lemna), 307 

 Duck-retter, 76 

 Dwarf larkspur, 76 

 Dysentery, 20, 107, 110, 233, 235, 

 245, 256 



Eagle, 44 



Earthworm, 25 



Eczema, 236 



Effluvia, 237 



Egg record, 104 



Egret, 40 



Elderberry, 86 



Elk, 169, 171 



Elm, 59, 82-84, 165 



Elm-leaf beetle, 21, 156 



Elodea, 307 



Endocarditis, 232 



English spaiTow, 45, 49, 50, 182 



Enteritis, 107, 232, 234, 235. Nrr 



also Gastro-enteritis 

 Entomostraca, 287 

 Eohippus, 333 

 Erysipelas, 234, 251 

 Eugenics, 344 

 European root disease, 212 

 Evening primrose, 70 

 Evolution, 338 

 Excursions, plans for, 7, 8, 9 



Facultative bacteria, 221 

 Fall web worm, 155 

 Farm crops, relative fertility of, 101 

 Feeble-mindedness, causes and con- 

 sequences of, 344 

 Felons, 233 

 Fence swift, 326 

 Fermentation, 191, 194, 195, 196 

 Ferns, 188 

 Field mice, 34, 44 



