INDEX 



15 



/.'•/• n nee* 



Eyes, continued 



of frog lit 



of grasshopper 11 



of man, care of 217 



of Nereis .si 



of vertebrates 215 



F 



Faeces, removal of 17." 



Fainting-, cause of 208 



Fangs of rattlesnake . . . 233 



Fats, absorption of 174 



furnished by animals .... 17" 



nutrients 1 



Fawns of Virginia deer (fig.) 166 



Feathers, a characteristic of 



birds 136 



of birds, modifications of skin 190 



Feeble-minded, number of . , 257 



Feelers, of bullhead .... 109 



of grasshopper 14 



Feet of birds, different kinds 



of (tig.) 139 



Fehling's solution, formula . 265 



test for sugar 266 



Female bobolink (fig.) .... 14"> 



grasshopper (rig.) 11 



strobilus of pine .">7 ( .» 



Femur, broken (fig.) . ... 187 



of grasshopper L6 



Fennel, member of parsley 



family :v_ ,( .i 



Fermentation, cause of . . . 350 



effect of 345 



produced by enzymes .... 345 



tubes (tig.) 355 



Fern, forked veins of (fig) . • 371 



garnet ophyte - ; 7l 



life history (fig.) . . . .371,372 



Fern group, plants belonging to 373 



Ferns, example of pterido- 



phytes 7 



field study of 373 



habitat of •"'<'• , . , 



laboratory study of .... 373 



Ferns and their Allies . . . .".o'.i 



in relation to water .... 375 



summary of 375 



Fertilization, defined . . . 68, '-"• > '. , 



are to pagt * 



Fertilization, continued 

 "i egg ••ell in the o\ iii.- . . , 



of frog 



Fertilized egg cell, beginning 



of new organism 



of volvox 



Fertilizers, use of, to supply 



elements 



Fibers in blood 



Fibrinogen, in format ion of 

 clot 



Fibrous roots, of buttercup 

 (fig.) 



of corn 



of grasses 



Fibrovascular bundles, cells 

 of 



in leaves 



in root 



structure of 



use of, in photosynl bests 

 Field study, of f.-rn^ . . . . 



of gymnosperms 



of insects 



Field suggestions, mammals . 

 Filaments, described .... 



Finches, beak of 



Fin rays 



Fins, of ftah 



use of, in balancing and steer- 

 ing 



Fires, forests destroyed by . . 



l>iv\ .niion of, by national g 



eminent 



Fire slash (fig.) 



Fire train in the Adiron- 



dacks (fig.) 



Fireweed in plant bu< ssion 



Firewood, furnished by b 



family 



Fireworks, ose of spores ol club 



iiio>s in 



Firs, conifers 



Fish, care of young 



skeleton of I fig. I 



mi in ma rv of 



Fish hatcheries 



Fishes, bony 



circul.it ion of 



classified 



121 



271 



a . i 



i^n 





12 



137 

 107 



1"7 



107 





100 





112 



112 



lb) 



106 

 109 



8 



