16 
INDEX 
References are to pages 
Fruit packers’ care not to break 
skin of fruit.243 
Fruits, distributed by animals . 241 
by wind.241 
distributers of seeds . 239, 241 
effect of cross-pollination on . 377 
furnish luxuries of food . . 244 
of rose family.298 
with hooks.241 
Fruits and seeds.245 
Fry.78 
Fucus vesiculosus.504 
Fuel, hardwood trees, source of 297‘ 
Fumigants.507 
Fundamental functions, dis¬ 
cussed .4,5 
Fundamental tastes . . .. 405 
Fundamental tissue of pteris 
stem.334 
Fungi, action in changing lava 
to soil.375 
as food.324 
classified. 9 
conditions favorable for 
growth.323 
summary of.326 
Fungus, an enemy of corn . . 324 
Furniture, lumber for .... 352 
Furs, as clothing.134 
Fusarium conglutinans, cause 
of cabbage yellows . . . 381 
% 
G 
Gall bladder of frog .... 86 
Gall flies, example of Hymen- 
optera.29 
Gallinules, toes of.121 
Game laws, purpose of . . . 395 
Gametes, defined.307 
of moss.329 
Gametophyte or sexual genera¬ 
tion of moss.329 
Ganglia, of clam.188 
of earthworm.181 
of grasshopper.25 
Garbage.519 
Garden slug, shell of ... 190 
Garden vegetables, belonging 
to mustard family . . . 298 
to parsley family .... 300 
Gas, a form of matter ... 10 
use in bread making . . . 427 
Gastric glands.409 
Gastric juice.412 
Gastric mill, of crayfish ... 63 
Geese, feet of.108 
wild, transients.112 
Gelatinous secretion of earth¬ 
worm .182 
Geotropism, defined .... 286 
Geranium slip, roots of . 379 
Germ, a name for unicellular 
organisms.309 
diseases........ 488 
in ice ..498 
G ermination, laboratory study of 227 
Germs.309 
a name for bacteria . . . 309 
getting well.491 
of disease carried by insects . 29 
Gila monster, poisonous lizard . 101 
Gill, cover.71 
Gill rakers.74 
Gill scoop, of crayfish .... 63 
Gill slits.69 
Gills, of fish.69, 74 
of clam.188 
of crayfish.63 
Ginger root, use of.256 
Girdle, pectoral.69 
pelvic.70 
Gizzard of earthworm . . . 181 
Glacial period, effect on man . 400 
Gland of starfish.170 
Glands, defined.409 
Glandular hairs of sundew . 361 
Glassy sponge, skeleton of . . 158 
Glomerulus of kidney 458 
Glucose. 14, 439 
Gluten.416 
Glycerin formed by zymase 427 
Glycogen, stored in liver 414, 439 
Gnats, eaten by birds. . . . 115 
Goats, economic importance of 133 
Goldenrod, a common weed . 301 
Goldfinch at feeding station 119 
Goldfish, a typical bony fish . 71 
killed by tobacco smoke . . 485 
Gonium.152 
Good food, value of, in cure for 
tuberculosis.491 
