Pancreatic juice, 232, 234 Panicle, 130 Pansy, fruit of, 166, 169 Parsley, 108; family, 106, 107; fool’s, 108; hedge, 107 Parsnip, 108 Passerine order of birds, 320 Pea, 99; family, 99, 101; fruit of, 7, 165, 168; leaves of, 39, 43; seed, 2, 7; seed, germination of, 9, 13 Pear, 104, 106; fruit of, 176, 180 Pellia, 199, 200 Penicillium, 207, 208 Perching of pigeon, 271 Perennial rye grass, 133, 137 Perianth, 119, 121 Pericarp, 167 Petal, 91 Pets, 214 Pigeon, 265, 270 Pigeons, different breeds of, 279 Pine cones, 160, 162, 171, 174 Pine, Scotch, 160, 161 Pistil, 91 Plane, 157, 159 Plants and animals, resemblances and differences, 243 Plants, respiration of, 243 Play of young animals, 248, 249, 258, 262 Plough-share bone of pigeon, 269 Plum, 106; fruit of, 175, 179 Plumule of bean, 2, 6 Pod, 103 Poison hemlock, 106, 107, 108 Pollen, 91 Pond-life, 340, 357, 378, 379, 390 Pond-snails, 379, 382 Pouter pigeon, 280 Poplar, 150, 151 Poppy, fruit of, 166, 168 Posterior, 217 Potato, 81, 84 Poultry, 296, 299 Precocious birds, 296, 329 Prickles, 75, 77 Primrose, 108, 109; fertilisation of, 109 Proboscis of butterfly, 367 Pro-legs of caterpillar, 365 Protective colouration, of frog, 332; of rabbit, 217 Prothallus, of ferns, 184, 185, 188, 191; of horsetail, 192, 195 Pupa, of cabbage-white butterfly, 363, 366; of Dytiscus, 361; of tiger-moth, 364, 369 Rabbit, 211; digestion in, 233 Radicle, of bean, 2, 6; of lupine, 7; of pea, 2, 7; of sycamore, 4 Radish, 94, 95 Raspberry, 105, 175, 179 Receptacle, 90 Red, clover, 101; fertilisation of, 101; corpuscles of blood, 237, 242 Reproduction, of a grass, 128; of a moss, 201; of ferns, 187, 188; of flowering plants, 89; of horsetail, 195; of liverwort, 201; of moulds, 208, 209; of mushroom, 205 Respiration, 240; definition of, 242; of chick-embryo, 294; of cockroach, 355; of crustaceans, 376, 377; of fresh-water mussel, 381; of frog, 337; of mammals, 242, 243; of pigeon, 279; of snail, 379, 382, 383; of tadpole, 344 Resting stage, of butterfly, 363, 366; of Dytiscus, 361 Ribs of rabbit, 217, 223, 227 Rock pigeon, 280 Rodents, 220 Rook, 312, 318 Root cap, 17 Root, hairs, 17, 28, 30; lengthening of, 16 Rootlets, 17 [Pg 432] Roots, 17, 21, 28; as storehouses of food, 28, 30; climbing, 75, 78; work of, 28, 30 Rose, 103, 104; family, 103; fruit of, 176, 180; leaves of, 38, 42 Rowan tree, 157 Ruminants, 261 Runner, 80, 82 Rushes, 133, 138 Rye grass, 133, 137 Saliva, 233, 234 Sallow willow, 150 Sand-martin, 311, 315 Saugh tree, 150 Scales of Lepidoptera, 364, 367 Scotch pine, 160, 161 Secondary thickening, 73 Sedges, 133, 138 Seeds, germination of, 9, 12; of broad bean, 1, 5, 9, 13; of maize, 18, 19; of mustard, 3, 7, 11; of pea, 2, 7;
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