INDEX 



491 



Wheat, proteid in, 177. 



rust of, 401, 402,* 403,* 404,* 405. 



starch in. 177. 



stinking smut of, 400, 401. 



smut of, 400, 401. 



stigma of, 292. 



strength of stalk of, 267. 



structure of grain of, 178. 

 Whistling wells, 125. 

 White, acknowledgement to, x. 

 White Poplar. See Poplar, White. 

 Whiting. See Lime carbonate. 

 Whitney, on soils, 129. 

 Wickson, on plant-breeding, 441. 

 Wild Mustard. See Mustard, Wild. 

 Wild Oat. See Oat, Wild. 

 Wiley, on bacteria, 384. 



on soils, 153. 

 Williams, on flour, 178. 

 Willow, cross-pollination of, 302. 



cuttings of, need air, 281,* 282. 



in northern latitudes, 356. 



pollen of, 292. 



regeneration in, 257. 



roots of, 126. 



starch in, 259. 



supplies carbon dioxide to aquaria, 285. 



transpiration of, 204. 

 Willow, Weeping, effect of light on, 346. 

 Willow Herb, dispersal of seeds of, 323. 

 Wilted plants, treatment of, 212. 

 Wind buries seeds, 69. 



carries pollen, 289, 300, 301. 



causes strains, 265. 



disperses seeds, 321-322. 



effect of, on fruit, 349. 



leaf, 345. 



plant, 348,* 349,* 350.* 



transpiration, 208, 348. 

 loosens bark, 248. 



Witch Hazel. See Hazel, Witch. 

 Witches' Brooms, 359. 



Wood, 120,* 121, 198,* 199,* 224*-227,* 228- 

 231,* 232*-234,* 235, 236*-237, 238*- 

 240,* 341. 



absorbs moisture from the air, 68. 

 annual rings of, 247. 

 decomposition of, 381. 

 effect of water supply on, 335,* 340. 



Wood, energy needed to raise sap in, 239, 

 210,* 241, 242, 243.* 



fall, 232,* 236,* 247. 



force of swelling, 68. 



heart of, 244, 245. 



injection of, 237. 



preservation of, 245. 



rate of conduction of sap in, 238,* 239. 



resistance of, to weather, 245. 



sap, 244, 245. 



seasoning of, 245. 



sectioning of, 230. 



spring, 232,* 236, 247. 



shrinking of, 245. 



starch in, 257-259. 



sugar travels in, in spring, 259. 



swelling of, 68. 



usefulness of, 245. 



water in, 245. 



Wood Anemone. See Anemone, Wood. 

 Wood-ashes as fertilizer, 152-154. 

 Wood cells, method of isolating, 235. 

 Woodchucks bury seeds, 69. 

 Wood Sorrel. See Oxalis. 

 Woodlands remain in good tilth, 129. 

 Woody fiber, deficiency of, in water-plants, 

 339, 



ring, formation of, 226, 246. 



texture protects against animals, 223. 

 Woods, on fertilizers, 153. 



flour, 173, 178. 



food of plant, 349. 



plant diseases, 407. 



pruning, 264. 

 - soil, 129. 



Woolly coverings. See Hairs. 

 Wormwood, protection of, against animals, 

 222. 



drying, 213, 333, 334.* 



Wounds, 319. 



cause fever, 388. 



treatment of, 171. 



Xahthium. See Cockbur, Clotbur. 

 Xenia, 311. 



Yeast, 169, 389, 390,* 391. 



Yellow not liked by bees, 298-299, 



Yellow fever, 380. 



