466 



INDEX 



FJower, effect of water on, 496, 342. 



foo.l needed by, 286, 287, 



formation of. 286, 287. 



improvement of, by breeding, 422, 423,* 

 424,* 425,* 427. 



injury of, 288. 



night blooming, 299, 300. 



opened by insects, 308. 



opening and closing of, 296, 297. 



platforms of, 309. 



production affected by heat, 347. 



light, 347. 



protection of, against drying, 288, 



insects, 308. 



water, 294, 295. 



position of, 30T, 308. 



respiration of, 287. 



sets free heat, 287. 



structure of, 288,* 290, 291.* 



work of, 28G-311. 



See, also. Anthers, Petals, Ovary and 

 Ovule. 

 Flower-buds, 286, 287. 

 Flowering, preparation for, 286, 287. 

 Food, as source of energy, 173, 176. 



— material for growth, 173. 

 crude, 201, 136-162. 

 digestion of, 166-172. 

 effect on plant, 349-351. 



elaborated, 57^* 65,* 164, 169, 179. 180,* 

 183, 253. 254, 260, 278, 286, 287, 313. 

 314. 



energy in, how measured, 173. 



flesh- orming, 176. 



from the air. 200. 



— — soil, 201. 



how conveyed to fniits, 313. 

 in buds, 253. 



— eggs. 176, 177. 



— leaves, 181. 332. 



— seeds, 57,* 65,* 164-180,* 437. 



— root, 122. 255, 260. 



— stem, 169, 243, 250, 253, 254-260, 286, 



287, 313. 314. 



— soil, 146. 



lack of. promotes fruit production. 350. 

 made soluble. 166-172. 

 manufacture of. 182-203, 253, 254, 278. 

 mineral. 136-162, 



Food, muscle-forming, 176. 

 needed by fruits, 312-316. 



plant, 326. 



organic, absorbed from soil, 150. 

 preservation of, 376, 377, 385-388, 397. 

 required for growth, 253. 

 storage of, in preparation for flowering, 



260, 286, 287. 

 stored, utilization of, 57,* 164, 179. 180.* 



183, 260, 286, 287, 313. 

 plant, dissolved by carbonic acid, 139-145. 



— fixed by clay, 145. 

 — humus. 145, 



— set fi'ee by lime. 152. 



— raw. 136-162. 201. 



wandering of, 57.* 164, 169, 180, 183, 253, 

 254-257, 259, 260, 286. 287. 313. 314. 

 Forage crops, time for cutting. 314. 

 Forests, effect of heat on, 356. 



hiimus in. 107. 



prevent floods. 112. 



remain naturally in good tilth, 129. 

 Forest, trees of. differ from isolated speci- 

 mens. 261. 

 Form of plant, effect of external agents on. 



See Plant, form of. 

 Formalin, as disinfectant and preservative 

 28, 364, 377. 386, 401. 



test for, in milk, 377. 

 Foxtail, seeds of, bury themselves, 71. 

 Fragaria. See Strawberry. 

 Franklin, on gypsum as fertilizer, 151. 

 Fraxinus. See Ash. 

 Freak, 420, 421. 440.* 

 Freezing. See Heat. 

 French Prune. See Prune. French. 

 Frost. See Heat. 

 Fruits, acid in, 315. 



air in, 317. 



air needed by, 317. 



air, how conveyed to, 317. 



attract animals. 324, 325, 



benefited by ringing, 257. 



effect of light on, 316, 347, 



— — water on, 342. 



wind on, 349. 



defi'^ition of, 4, 312. 

 fat in, 314. 

 epidermis of, 317, 



