828 



INDEX 



Walnut, 64, 99, 128. 

 'Wart,' Potato, 710. 

 Water, absorption of, 182. 



conduction of, 198. 



culture, 169 (Fig. 82). 



Dropwort, 455. 



Hemlock, 454, S77- 



in plants, 153. 



■ influence on growth, 245, 257, 774. 



Wavy hair-grass, 537, 668 (Figs. 177, 



2t4). 



Waxy bloom on plants, 114. 

 Webb's Beardless barley, 506. 

 Weeds, 571. 



duration of, 577. 



extermination of, 582, 



Weeds, habit of growth, S79- 



how spread, 580, 



injurious effects of, 571. 



of arable ground, 589. 



of pastures, 604. 



Wet-rot of potatoes, 707. 



Wheat (Figs. 7, 8, 81), 22, 92, 276, 287, 



303, 309, 313, 316, 515-528, 550. 

 ^\'heat-grass, 551. 

 Whickens, 551. 

 Whin, 436. 

 Whip-grafting, 266. 

 White beam, 65, 405. 

 clover, 29, 425, 653 (Figs. 131, 132, 



204). 



dead-nettle, 283 (Fig. 102). 



heart cherry, 49. 



lupin, 437. 



melilot, 432. 



mustard, 16, 383, 386 (Figs. 5, 



123)- 



seed of, 642. 



poplar, 66. 



rot, 807. 



rust, 714. 



thorn, 66, 407. 



Willow, 65. 



W^hite's early hop, 341. 

 Whorl, 74. 

 Wild apple, 263. 



cabbage, 366, 



carrot, 4, 3r2, 444, 606, 



cherry, 400. 



cornel, 6r. 



hop, 344. 



mustard, 591. 



oat, 493, 539 (Fig. 155), 602. 



pansy, 279, 317, 667 (Fig. 202). 



Wild parsnip, 4, 312. 



pear, 30, 54, 263. 



plum, 54, 67, 399. 



radish, 386, 592, 656. 



service tree, 65, 405. 



Willow, 44, 65, 83, 87, 88, 90, 102, 136, 



SOS- 

 Willow-herb, 102. 

 Wind-fertilisation, 281. 



pollination, 281. 



Winter bean, 417. 

 Winter-green, 225. 

 Woad-wax, 437, 606. 

 Wood (Figs. 54, 55), 117. 



avens, 408. 



meadow-grass, 543, 672. 



rush, 612. 



vetcbling, 420. 



Wood-parenchyma, 119. 

 Wool-sorter's disease, 805. 

 Wormwood, 470. 

 Wounds, healing of, 131. 

 Wych elm, 63. 



Xanthophyll, 212. 

 Xylem, 117. 



Yarkow, 473. 



Veast, 232, 746 (Fig. 253). 



Yellow flag, 329. 



lupin, 437, 438. 



melilot, 432. 



oat-grass, 539 (Figs. 178, 213), 555, 



668. 



rattle, 102, 225, 327, 576, 610. 



suckling, 428 (Fig. 205), 654. 



■ trefoil, 429. 



seed of, 646 (Fig. ig6). 



Yew, 126. 



Yorkshire fog, 535 (Figs. 175, 210), 555, 



665. 



Zigzag clover, 424. 



Zinc, 16S. 



Zinnia, 470. 



Zooglcea, 770. 



Zoology, I. 



Zoospore, 680, 694 (Fig. 233). 



Zygomorphic, 8r. 



Zygomycetes, 688, 689. 



Zygospore, 689. 



Zygote, 294. 



Zymase, 232, 747, 



TURNBULL AND SfEARS, PRINTERS, EDINBURGH 



