INDEX 
101 
* 
Filtration, 47 
Fin, 81; anal, 77; caudal, 77; dorsal, 
77; pectoral, 77; pelvic, 77 
Fin rays, 77 
Fish, 77 
Flight, 83 
Floral parts, 4 
Floret, 4, 5; disk, 4; ray, 4 
Flower, 1, 2, 3, 4, 5, 87, 88, 90, 92; 
arrangement, 4; cluster, 3, 4; com¬ 
posite, 4; simple, 3, 4 
Flowering, 88, 91 
Food, 89, 93 
Food habits, 75, 89, 93, 94 
Foot, 50, 58, 73, 79, 83, 84 
Frog, 78, 79, 80, 81, 82 
Fruit, 7, 8, 88, 90, 92 
Fruiting body, 33 
Fungous growth, 32, 33 
Fungus, 32, 33 
Fur, 84 
Ganglion, 63, 66, 69 
Garden, 75 
Gastric caecum, 68 
Geotropism, 77 
Geranium, 3, 27 
Germination, 11, 15 
Gill, 66, 78, 81; arch, 78; external, 
81; opening, 78, 81 
Gizzard, 62 
Glucose, 12, 20, 36 
Granule, 58 
Grasses, 1 
Grasshopper, 66, 67, 68, 69, 
“Green glands,” 64, 66 
Grub, 69 
Guard cell, 27 
Gullet, 50, 52, 59 
Habitat, 92 
Hand, 79 
Hay infusion, 41, 43, 58 
Head, 50, 64, 66, 67, 69, 70, 71, 73, 
78, 79, 83 
Health, 37 
Hearing, 64 
Heart, 52, 53, 62, 65, 68, 80 
Heart beat, 53 
“Heart rot,” 33 
“Heart-wood,” 25 
Hilum, 7, 9 
Homologous structures, 64 
Honey bee, 6, 7, 72 
House fly, 72, 73, 74 
Hydra, 60 
Hydrotaxis, 76 
Hypha, 32 
Hypocotyl, 9, 11 
Immature ear, 2 
Insect, 5 
Internode, 1, 2, 24 
Interrelation, 74, 85 
Intestine, 51, 68, 80; large, 51, 80; 
small, 51, 80 
Involucre, 4 
Iodine, 12, 13 
Jaws, 49, 64, 79, 82 
Kernel, corn, 2, 9, 10 
Kidney, 51, 63, 80 
Labium, 67 
Labrum, 67 
Large intestine, 51, 80 
Larva, 69, 71, 73 
Larynx, 51 
Lawn, 75, 92 
Leaf, 1, 2, 26, 27, 29; appearance, 
90; arrangement, 27, 28, 90, 91, 
92; compound, 27; form, 90, 91, 
92; scar, 23; simple, 27 
Legs, 49, 66, 67, 71, 73, 81, 82, 84 
Lettuce, 17 
Light, 78 
Lilac, 86, 87 
Limb, 49, 79 
Lips, 51 
Liver, 50, 66, 80 
Locomotion, 82 
Locust, 5, 66, 67, 68, 69 
Lungs, 54, 55, 80 
Macronucleus, 59 
Maggot, 73 
Mammal, 83, 84, 93 
