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 Funaria, 201.

Function, 1,  9.

Fungi, 187.

Fungus, 107, 108, 184, 187, 195.

Gametophyte, 179.

Gamopetalous, 134.

Gamosepalous, 134.

Ganglion, 45,  120.

Ganglionic system, 127.

Garbage, 163.

Gasteropod, 108.

Gastric juice, 103.

Gastrula, 7.

General sensation, 144, 145.

Generation of plants, 16.

Genus, 8.

Geographical barriers, 148.

Geotropism, 44, 47.

Germination, 22, 23, 27.

Gila monster, 147.

Gills, of mussel, 100; of fish, 115.

Glands, lymphatic, 65.

Gland tissue, 13.

Glomerule, 160.

Gnawing mammals, 203.

Gopher, pouched, 204.

Gorilla, 221.

Grafting, 125.

Grain, 95, 112.

Grantia, 18.

Grape sugar, x, 88, 92.

Grasshopper, 70.

Grit cells, 67.

Guard cells, 88.

Gullet, 74, 94, 101.

Gymnastics, 47.

Gymnosperm, 26, 170.

Gypsy moth, 95.

Habit, 131.

Hairs, 87,  19.

Hands, 4; defined, 220.

Headaches, 132, 133.

Heart, human, 51, 52; insect, 77; sound of, 60.

Heating, 84.

Hemiptera, 82.

Hemoglobin, 59, 81.

Herb, 17.

Heredity, 147, 153,  4.

Hessian fly, 95.

Hill, Dr. L. H., quoted, 140.

Hilum, 21, 26.

Hip, 4,  168.

Hollyhock, 147.

Homology, 135.

Horned toad, 140.

Host, 107.

House fly, 92, 93.

Houstonia, 107.

Human species, 1,  220.

Hydra, 22.

Hydranth, 29.

Hydrochloric acid, 103.

Hydroid, 28, 29, 30.

Hygiene, 49, 66, 80, 107, 129, 141.

Hymenoptera, 82.

Hyphæ, 107, 188.

Hypocotyl, 22.

Hypogeal, 23.

Hypostome, 23.

Ichneumon fly, 89.

Imago, 81.

Immunity, 158, 160.

Indehiscent, 164.

Indian, 2.

Indusium, 177.

Inflammation, 68, 86.

Inflorescence, 155, 160.

Infusoria, 16.

Inhibit, 68.

Inorganic, 1.

Insecticides, 95.

Insects, 73, 75; biting, 82; classified, 82; sucking, 82.

Inspiration, 77.

Instinct, 80, 121;  49.

Intercostal, 77.

Internode, 52.

Intestinal gland, 104.

Intestine, 98, 103, 106.

Involucre, 34, 141, 163, 164.

Iodine test for starch, x.

Iris, 143, 151.

Iron, vii, 39.

Iron tonics, 90.

Isoëtes, 203.

Ivory, 98.

Jacana, Mexican, 178.

Jay, blue, 181.

Jelly fish, 29, 30.

Joints, 29, 35, 36.

Kangaroo, 198.

Key fruit, 164.

Kidneys, of fish, 117; of insects, 76; of man, 26, 27; of mussel, 102; of worm, 45.