444 



INDEX 



Primrose, mutations, 385; 



pollination, 37. 

 Proboscis, of insects, 27. 

 Proglottids, 288. 

 Prolegs, of caterpillar, 29. 

 Pronuba, moth, 38. 

 Propagation, vegetative, 220. 

 Proteins, 53, 119; 



amount needed daily, 132 ; 



digested and stored in plants, 92 ; 



digestion of, in man, 153, 154, 155 



foods containing, 124; 



fuel value, 120 ; 



made by green plants, 84 ; 



not all good tissue builders, 120 ; 



poisonous, 272; 



spHt, 261, 271, 272; 



test for, 54, 55 ; 



value as food, 120, 130. 

 Protoplasm, 44; 



composition, 120; 



discovery, 405; 



streaming of, 46. 

 Protozoa, classified, 238, 239 ; 



food supply, 347 ; 



in rock building, 355 ; 



parasites, 278, 281, 282, 283 

 Pseudopodia, of amoeba, 99. 

 Pteridophytes, 236. 

 Ptomaines, 272. 

 Ptyalin, 151. 



Pidmonary circulation, 170. 

 Pulse, 173. 

 Pulvini, 194, 195. 

 Pupa, 229 ; 



butterfly, 29. 

 Pupil of eye, 205. 

 Pure culture, 255, 256. 

 Pure Food Law, 138. 

 Pus, 113. 



Push cart T^dth glass covers, 300. 

 Pyloric cseca, 245. 

 Pylorus, 153. 



Quahog, 349. 

 Quarantine, 268, 269. 

 Quetlet's curve, 384, 385. 

 Quinine, 279, 330. 



Rabies, 274, 282. 

 Races of man, 251. 



Rats, 286, 287, 365. 



Reasoning, 202. 



Receptacle, 31, 32. 



Recessive characters, 388, 389, 397. 



Red blood corpuscle, 163. 



Redi, biologist, 406. 



Reed, Dr. Walter, investigator, 281, 



411. 

 Reflex simple, 196, 197, 199 ; 



in instincts, 209. 

 Refuse, in foods, 124. 

 Regeneration, in animals, 221. 

 Rennin, 153. 



Reproduction, by cell division, 219, 

 220; 



in animals, 220, 222, 226-232 ; 



in plants, 219-226; 



in plants and animals, compared, 

 93; 



indication of life, 152. 



of paraoecium, 99 ; 

 Reproductive glands, 167. 

 Reptiles, 246, 247; 



food of man, 35. 

 ReptiHa, 243. 

 Respiration, 177-183; 



artificial, 182, 183; 



cell, 179, 180; 



effect of exercise, 186 ; 



mechanics of, 180-183; 



necessity for, 177; 



of plants, 86 ; 



organs of. 111, 177, 178. 

 Response to stimuli, an indication of 

 life, 14-15; 



in plants and animals, 192-195. 

 Retina, 205. 

 Rheumatism, 151, 182. 

 Rhizoids, 222. 

 Rhizopoda, 239. 

 Rice, 328. 



Rickets, deficiency disease, 123. 

 Rind of corn stem, 90. 

 Ringworm, 336. 

 Robins, food of, 359. 

 Rockefeller Foundation, work on 



hookworm, 290. 

 Rodentia, 249. 



Roosevelt, Theodore, quoted, 310. 

 Roosters, heads of, 381. 



