Index 



665 



palate, 399, 634 



palmate leaves, 497, 634, (498) 



Panama canal, 543 



pancreas, 401, 403, 405, 424, 634, 



(401) 



pancreatic juice, 402-403, 405 

 paper, 516 

 papillae, 399, 634 

 parachute, 286, 634 

 paraffin, 191 



parallels of latitude, 119, 157, 634 

 parallel-veined leaves, 497, 634, 



(498) 

 paramecium, 319-321, 325, 345, 634, 



(319) 

 parasites, 307, 324, 440, 448, 451, 



452, 453, 465-466, 518, 541, 634 

 parotid glands, 400, 634 

 pasteurization, 469, 634 

 Pasteur, Louis, 379, 449, 469, 551, 



562-563, 577, (562) 

 peat, 89, 91, 93, 634 

 pectoral girdle, 330-331, 634 

 Pelton wheel, 73, 75, 634, (73) 

 pelvis, 330-331, 634, (331) 

 pencil of light, 181, 634 

 penstock, 75 



penumbra, 183, 635, (183) 

 pepsin, 402, 405, 406, 635 

 peptone, 425 

 pericardium, 418, 635 

 peristalsis, 401-403, 410, 413, 434, 



635 



peritoneum, 402, 635 

 perpetual motion, 253 

 Perseus, 164, (163) 

 perspiration, 426 

 petiole, 497, 635 

 Petri dish, 441, 635, (442) 

 petroleum, 91, 93, 191, 635 

 pharynx, 342, 346, 398, 400, 635, 



(342) 



phases of moon, 153-155, 635, (154) 

 phonograph, 175, 584, 635 

 phosphates, 307, 355, 635 

 phosphorus, 27, 29, 35, 83-84, 85, 



307, 364-365, 372, 452, 635 

 photoelectric cell, 582-584, 585, 



586, 587, 588-589, 635 

 photography, 188, 190, 582, 584- 



588, (584, 586, 587) 



photosphere, 150, 151, 635, (151) 

 photosynthesis, 499-501, 635, (500) 

 physical, 



change, 16, 635 



property, 14, 24, 35, 635 



union, 30 



physical basis of life, 313 

 physical culture, 335, 635 

 physical geography, 6, 635 

 physics, 6, 635 

 physiological division of labor, 



324, 635 



physiology, 6, 635 

 piano player, 173, 174, 635 

 pickling, 445, 447 

 pig iron, 297 



pinnate leaves, 497, 635, (498) 

 piston, 18, 251, 260-262, 263, 265, 



635 



pitch of sound, 173, 175 

 planets, 149, 150, 151, 635 

 plants, 180, 439, 491-503, 527-534, 

 567, 635, (490, 505, 507, 522, 

 529, 530, 532) 



and alcohol, 395 



and soil, 301, 304 



cell, 313-315, 316, 395, 491-492, 

 (313, 316, 492) 



factors affecting growth, 306, 

 492, 497, 521 



food, 304, 499, 501, (505, 507, 529, 

 536) 



germination, 494, 506-510, (508, 

 509) 



importance of osmosis, 494-496 



nitrogen and, 27, 36, 499 



structure and functions, 312, 



440, 491-503, 504-508, 538 

 plasma, 341, 416-417, 420, 635, (341) 

 plate, photographic, 188, 582 

 platinum, 29, 635 

 player piano (see piano player) 

 Pleiades, 161, 163, 164, (163) 

 plenum system, 113, 644 

 pleura, 341-342, 636, (342) 

 plumbing, 60-61, 636 

 plumule, 504-508, 636, (505, 507) 

 Pluto, 150, (149) 

 pneumonia, 345, 346, 347, 394, 454, 



471, (460) 



point of saturation, 122, 636 

 poisoning, 485 



