INDEX 



553 



heat, 11; energy, 46. 



heliotropism, the response of plant 



parts to light, 88. 

 hilum (scar), 31, 34. 

 homology, 184. 

 hookworm, 166, 167. 

 Hooke, discovered cell walls, 537, 



538. 

 horses, breeding and selecting for 



trotting, running, draught, etc., 



493. 



horse-tails, 127. 

 Hornaday, Wm. T., 274, -276. 

 household pests, 475. 

 Hunter, Arthur, actuary, N. Y. Life 



Ins. Co., quoted on alcohol, 520. 

 Hurty, Dr. J. N., quoted on alcohol, 



521. 

 Huxley, Thomas Henry, English 



scientist, 211, 542. 

 hydra, 157, 234. 



hydrogen, 12, 17, 19; supply of, 531. 

 hydrotropism, the response of plant 



parts to water, 58, 61, 63. 

 hygiene, 2, 4; of eye, 422, 425, 430; 



of muscles, 426; of digestion, 428; 



of respiration, 429; of bathing, 



431; of teeth, 432; of feet, 432; 



of nerves, 433 ; public, 437; mental, 



437. 

 hymenoptera (membrane winged), 



211. 



hypocotyl, primitive stem, 33; ap- 

 pears first, 42, 43. 



Iceland moss, 457. 



immunity, acquired, 139. 



indigo shrub, 462. 



incubation, 300. 



influenza, 142. 



inorganic matter, 1; examples of, 7, 



15, 19. 



inheritance, 328. 

 insecta, 173; classification, 193. 

 insects, agents in pollenation, 110, 



113; and disease, 220-232; harm- 



ful and useful activities, 473, 474. 

 inspiration (breathing in), 386, 387. 

 intestines, of man, 363, 372, 373, 405. 

 iron, 14, 17, 23. 

 iron oxide (rust), 14. 

 isinglass, fish product, 481. 



James, William, quoted, 413. 



jellyfish, 157. 



Jenner, Dr. Edward, first to suggest 



vaccination for smallpox, 537. 

 jute, 457; see bast. 



kernel (seed), 31. 



kidneys, 403. 



King, A. F. A., 231. 



Koch, Robert, identified bacteria of 



tuberculosis and Asiatic cholera, 



539. 



leaves, functions of, 86; general 

 structure, 87; forms, 87; arrange- 

 ment, 88; . heliotropism, 88; modi- 

 fications of, 88; fall of, 88; other 

 functions, 99; use for food, 455. 



labium, 194, 212. 



labrum, 194, 212. 



Lamarck, 326. 



larva, of butterfly, 207; forms of, 

 217. 



Lazear, Dr., see yellow fever. 



legumes, 119; importance as food, 

 451, 452. 



lemurs, 318. 



lens, of eye, of camera, 420. 



lenticels, 75. 



lepidoptera (scale winged), 205; harm- 

 ful moths, 476. 



leprosy, 137. 



lichens, 127; rock, 128; Iceland moss, 

 455. 



lipoid, 355. 



