i.\i)i:.\ 



Refert net b 



Formalin, in milk 180 



used as disinfectant .... 'J.V. 



Fossils, described 124 



shells of animals qow extinct 



(fig.) 124 



Foul breath caused by bac- 

 teria KIT 



Foxes (fig.) 151 



Fox sparrows, transients . . 141 

 Fox terrier, comparison of 



primitive horse with . . . 154 

 Freezing 1 , protection of bacteria 



from 345 



Fresh air, a condition for health 240 



aid in curing consumption . . •_'■">•; 



Freshets, cause of 386 



Fresh-water planarians . . 7(i 



Frog", bull, development of . . L23 



central nervous system of (fig.) 118 



common (fig.) 114 



description of 113,114 



eggs (tigs.) 120, 121 



example of amphibians ... 7 



enemies of 115 



food of 115 



green, development of . . . 123 



habitat of 114 



internal structure of .... 115 

 laboratory study of . . .114, 120 



leopard, description of ... Ill 



organs of (fig.) 11<>, 117 



reproduction of 117 



respiration of 115 



tree (fig.) 126 



Fronds of pteris 370 



Fruit, buds of cherry (fig.) . . 289 



defined 308 



of apple (fig.) 309 



of beau (fig.) - ;i| 7 



of bean and corn 308 



of corn (fig.) 307 



of pine 



of poppy (fig.) ■"■"* 



production in connection with 



storage roots 283 



steps in de\ elopmenl of . . • 308 

 Fruits, distributed by animals 



• tig.) 311 



by wind (fig.) 312 



distributers of seeds . . . . 311 



by 



are to pagt 



Fruits, tontinvu 

 furnish luxuries of food • 

 new varieties produced 

 cross-pollination . 



of rose family 



w itli hooks (fig.) 



Fruits and seeds in- i . . . 



Fry. distribution of 



Fuel, hardwood 1 1 lurce of 



Fumigants 



Functions, definition of . . . 

 Fundamental tissue of pteris 



stem 



Fung-i, action in changing lava 



1" --oil 



classified 7 



conditions favorable for 



growth 



summary of 



Fungus, an enemy of corn . . 



Furniture, lumber for .... 



Furs, as clothing 



::il 



401 



.11 

 Ml 

 111 



1 







362 

 291 



G 



Gall bladder of i !.>_' .... 117 



Gall flies, example of ll\ menop- 

 tera 20 



Gametes, defined 341 



of moss 



Gametophyte or sexual gen- 

 eration of moss .... 



Gametophytes of moss . . 



Ganglia, of clam 



<>f earthworm 



Garden slug, shell of .... 



Garden vegetables, belonging 

 to mustard family . 

 to parslej family .... 



Garter snake, harmless 



Gas, a form of matter .... 

 use in bread making .... 



Gastric gland (li-. i , . 169,171 



Gastric juice 171 



Gastric mill, of crayfish . . 



Gastropoda rlussinVd . . . 



Gtoese, feel "t 137 



wild, t ransientfl l '1 



Gelatinous secretion of 



earthworm 



