440 



INDEX 



Jimson weed, 332. 

 Juke family, 398. ' 

 Jungle, 17,*^ 18. 

 Jute, 331. 



Kallikak family, 398. 

 Kdneys, 187, 188. 

 Koch, Robert, life, 410. 

 Kohl-rabi, 324. 



Labor, di\dsion of, 108-109. 



Laboratory equipment, 430. 



Lac insect, 357. 



Lacertilia, 247. 



Lactase, 157. 



Lacteals, 158, 174. 



Lactic acid, 340. 



Lactometer, 139. 



Ladybird, 28. 



Laitinen, Professor, cited, 141. 



Langerhans, Islands of, 167. 



Lantz, David E., quoted, 365. 



Larva, 27, 229. 



Larynx, 150. 



Lazear, Dr. Jesse, work on yellow 



fever, 280. 

 Leather, 355. 

 Leaves, 75-86; 



arrangement, 80; 



change of color, 81 ; 



changes in position, 194; 



dandelion, 80; 



evaporation from, 75 ; 



food, for man, 323 ; 



mosaic, 80; 



regulation of temperature, 79 ; 



respiration by, 85 ; 



starch made by, 81-84 ; 



structure, 47, 76, 77 ; 



transpiration, 77-79. 

 Leeuwenhoek, Anton van, 44, 406. 

 Legs of a bee, 33. 



Legumes, add to soil fertility, 341, 

 342; 



value as food, 129. 

 Lenticels, 86, 88. 

 Leopard frog, 230, 231. 

 Lepidoptera, 26, 27, 242. 

 Lettuce, 324. 

 Leucocytes, 168. 



Life, 14, 15; 



comes from life, 406. 

 Life cycle, 228. 

 Life history, 94, 228; 



of butterfly, 28 ; 



of house fly, 284 ; 



of mosquito, 280. 

 Ligaments, 114. 

 Light, influence on living things, 16 ; 



on bacteria, 258; 



on plants, 16, 80, 81. 

 Lighting, methods of, 294. 

 Limewater test, 11. 

 Linen, 331. 

 Lipase, 155. 



Lister, Sir Joseph, life, 410. 

 Liver, 156, 168; 



blood supply, 172. 

 Liver fluke, 228. 

 Liverworts, 236. 

 Lizard, 246. 

 Lobster, 349, 350; 



conservation, 371. 

 Lockjaw^, 273. 

 Loeb, Jacques, cited, 14. 

 Loosestrife, pollination, 37. 

 Louse, 283. 



Lubbock, Sir John, biologist, 33. 

 Lumbering, 317, 370. 

 Lunches, school, 298. 

 Lungs, 178, 179. 

 Lymph, 168, 174. 

 Lymph vessels, 173. 

 Lysins, 165, 166, 276. 

 Lysol, 260. 



Macronucleus, of Paramecium, 98. 



Malaria, 278-281. 



Malarial mosquito, 279, 280. 



Malarial parasite, 279. 



Malta fever, 266. 



Maltase, 157. 



Mammalia, 243. 



Mammals, 248, 249 ; 



adaptations, 237, 249; 



brain, 200; 



classified, 249; 



food for man, 353 ; 



reproduction, 232. 

 Mammary glands, 249. 



