INDEX 



579 



Insects, 380-403; in pollination, 



199. 



Instincts, birds, 434; insects, 403. 

 Inter-cellular substance, 41. 

 Interdependence of animals and 



plants, 128. 

 Intestines, human, 470. 

 Irritability, 129 ; -Hydra, 328 ; Para- 



mecium, 305; plants, 116-119. 



See also nervous activity. 



Jelly-fishes, 335. 



Kidneys, frog, 35; human, 508. 

 King-crab, 378. 

 Koch, Dr., 314. 



Labor, division of, 306, 329. 



Lanaellibranchs, 408. 



, barnacle, 375 ; butterfly, 

 383; frog, 63; mosquito, 396, 

 399 ; worm, 349. 



Leaf, 73-76; 188, 196; arrangement, 

 189 ; variegated, 103. 



Leaf-scars, 163. 



Lenticel, 112. 



Lepidoptera, 388. 



Lichens, 266. 



Life-activities, animal, 13-18, 44- 

 57 ; in cells, 41 ; human, 457-523 ; 

 plant, 18-20, 119-121. 



Light, artificial, on plant growth, 

 104 ; on oxygen-supply of plants, 

 111; in photosynthesis, 102, 111. 



Limulus, 378. 



Liquors, see alcohol. 



Liver-fluke, 343. 



Liver, human, 470. 



Lobster, 358. 



Locomotion, animal, 14 ; plant, 18. 



Locusts, 382, 385. 



Lungs, 503. 



Lymph, 32, 485. See also circula- 

 tion. 



M 



Machinery, of life, 21. 



Maize, 149. 



Malaria, 312-314, 394-396. 



Mammals, 436-442. 



Man, biology and classification, 455, 



456 ; structure and life-activities, 



457-523. 



Manures, and bacteria, 287. 

 Mastication, 471, 530. 

 Matter, organic, 2 ; three states of, 



5; gray, 512, 514; white, 502. 

 Medusa, 332, 335. 

 Mesentery, 33. 

 Metabolism, 53, 109, 120, 125, 499. 



See also growth, repair, assimilation. 

 Metamere, see segment. 

 Metamorphosis, frog, 62 ; insect, 



384 ; worm, 349. 

 Metazoa, 320. 

 Microbes, see bacteria. 

 Micro-organisms, see bacteria, and 



protozoa. 



Migration, bird, 434. 

 Mildew, 259. 



Milk, 473 ; bacteria in, 288. 

 Millipede, 379. 

 Mimicry, 400. 

 Minerals, in organic matter, 12 ; as 



foods, 464 ; in soil, 97. 

 Molds, 252. 

 Mollusca, 405-416. 

 Molting, bird, 431 ; crustacean, 368. 

 Monocotyledon, 152 ; stem, 167. 

 Monoecious, 243. 

 Morphology, definition of, 21. 

 Mosquitoes, 312, 393-396. 

 Mosses, 241-245. 

 Moth, 382. 



Mouth-cavity, human, 465. 

 Movement, animal, 14 ; blood, 486 ; 



plant, 18; protozoan, 305, 308; 



respiratory, 504 ; stomach, 472. 

 Mulching, 87. 

 Muscle, cells, Figs. 14, 15 ; hygiene, 



537-539. 



Mushroom, 263-268. 

 Mycelium, 252, 264. 

 Myriopods, 379. 



