18 



INDEX 



References are to pages 



Genera Plantarum, published 



by Linnaeus 303 



Geometrid moth (rig.) ... 32 



Geotropism, defined .... 284 



Geranium, life processes of . . 259 



simple leaf of 294 



slip, roots of 284 



study of flowers of 302 



Germ, a name for unicellular 



organisms 343 



diseases 233 



Germination, laboratory study 



of 265 



of corn (fig.) 277 



Germs 233 



a name for bacteria .... 343 



in dust in houses 235 



of disease carried by insects . 21 



Giant cactus (fig.) 395 



Gila monster, poisonous lizard 



(fig.) 131, 135 



Gill, cover 107 



Gill rakers 108 



Gill scoop, of crayfish .... 90 



Gill slits 104 



Gills 107 



of clam 96 



of crayfish 90 



Girdle, pectoral 105 



pelvic 105 



Gizzard of earthworm ... 81 



Gland of starfish 72 



Glandular hairs of sundew . 390 



Glassy sponge, skeleton of . . 61 



Glomerulus of kidney . . . 208 



Gluten changed by heat . . 179 



Glycerin formed by zymase 179 



Glycogen, stored in liver . . 174 



Gnats, eaten by birds .... 145 



Goats, economic importance of 154 



Golden rod, a common weed . 334 

 Goldfinch at hemp and millet 



station 148 



Goldfish, a typical bony fish . 106 



killed by tobacco smoke . . . 230 



Gonium (fig.) 55 



Gophers, harmful mammals . 155 

 Government inspection, of 



meat 78, 242 



of oyster beds 102 



Grafting, effect of 402 



kinds of (figs.) .... 286, 287 



Grain, differs from bean . . . 262 



food for birds 149 



of corn, a form of fruit . . . 310 



Grains, large numbers of . . . 314 



Grantia classified 6 



described 58 



Grape, example of berry . . . 310 



Grapevine, wild, like liana . . 287 



Grass family 323 



compared with rose family . . 328 



Grass, life processes of . . . 259 



monocotyledon 263 



wind-pollinated flower . . . 305 



Grasses, flowers of 323 



importance of, as food . . . 400 



in plant succession 400 



Grasshopper, classified ... 6 



classification of 19 



described 12 



foot of 16 



hairworm in body of (fig.) . . 79 



injurious to corn plants . . . 316 



laboratory study of ... . 13 



laying eggs (fig.) 15 



life history of 15 



member of Orthoptera ... 20 



mouth parts of (fig.) .... 14 



parts of (fig.) ....... 13 



representative animal ... 1.1 



structure of 19 



Gravity, influence of, on roots . 284 



Gray squirrel (fig.) .... 151 



Gray substance of nerves . 211 

 Great-crested flycatcher, 



food of 26 



Great northern shrike, winter 



visitant 141 



Grebe (fig.) 136 



Greeks, use of beans by . 317 



Green Algge 338 



Green frogs, development of . 123 



Green hydra, habitat of . . . 66 



Green manure 270 



Green manuring 318 



Green turtles 131 



Gristle, defined 184 



Groove, on underside of starfish 73 



Grosbeaks, beak of 137 



