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 Kinetoscope, 151.

Labial palpi, 68, 74, 101.

Labium, 68, 74.

Laboratory, 3.

Labrum, 68, 74.

Labyrinth, 157.

Lacteal, 64, 65, 104, 105.

Lady bug, 91.

Lamellibranch, 107.

Landscape, 13.

Lark, meadow; 182; sky, 179.

Larkspur, 148, 149.

Larva, 81.

Larynx, 72.

Lasso cell, 34.

Lateral spinal curvature, 37.

Latex tubes, 67.

Leaf, apex of, 80; base of, 80; function of, 92; margin of, 80; structure, 86.

Leaf scar, 90.

Leaves, arrangement of, 82; shapes of, 78, 85.

Leg, of bird, 152; of horse, 210; of insect, 74; of man, 33.

Legume, 165,  95.

Legume family, 35, 169.

Lemur, 220.

Lenticel, 89.

Lepidoptera, 82, 87.

Lichens, 195.

Ligneous, 17.

Lime water, xx, 70.

Liver, 105.

Liverworts, 196.

Lobes of leaf, 75.

Lobule of lung, 75.

Locule, 136, 163, 166.

Loculicidal dehiscence, 166.

Louse, 92, 93.

Lumber, 68.

Lungs, of bird, 165; of man, 76.

Lycopodium, 204.

Lymph, 52, 62, 63.

Lymphatics, 62, 63.

Lymph spaces, 63.

Macrospore, 203, 204.

Madreporite, 35.

Malaria, 160.

Malay, 1.

Mammal, 184,  111; classified, 193; defined, 189.

Manatee, a 209.

Mandibles, 68, 74.

Mantis, praying, 3.

Mantle, 99.

Marchantia, 196.

Maxillæ, 68, 74.

Maxillary palpi, 68, 74.

May beetle, 90, 91.

May fly, 83.

Measuring worm, 81, 84.

Medulla, 122, 123.

Medullary ray, 64.

Medusa, 31.

Mesoglea, 26.

Mesophyll, 86.

Metamorphosis of insect, 80, 81, 82.

Metazoan, 1.

Micropyle, 21, 26.

Microscope, 21, 26.

Microspore, 203.

Midrib, 77.

Migration of birds, 171, 173.

Milk, 91, 95, 96, 112.

Mimicry, 146.

Mind and health, 129.

Minerals, xiv, 90, 91, 93, 95.

Mint family, 139.

Mistletoe, 109.

Moccasin, 145.

Mold, 188.

Mole, 201.

Mollusk, 9, 97, 125.

Molting, 69, 174.

Mongolian, 1.

Monkey, 220.

Monocotyledons, 20, 25, 63.

Monœcious, 138, 150, 170.

Morphine, 105.

Morula, 7.

Mosquito, 92, 93, 96,  160, 161.

Mosses, 199.

Moss, Spanish, 110.

Moth, 83.

Mother-of-pearl, 99.

Motor, cell, 120; fiber, 120.

Mullein, 87.

Municipal sanitation, 162, 163.

Muscadine, 36.

Muscles, 39; arrangement of, 41; control of, 39, 44; function of, 39, 43; growth, 42; kinds of, 39; structure of, 39.

Muscles and health, 45.

Muscular sense, 142, 146.

Muscular tissue, 11.

Mushroom, 107, 194.

Mussel, 96, 103.