546 



NATURE-STUDY 



Trillium, 321. 



Triton, 160. 



Tropical fruits, 491. 



Trout, 173. 



Tsetse fly, 224. 



Tuber, 310. 



Turkey, 106, 108, 115, 122. 



Turtle, 163. 



Twigs, 313. 



Useful animals, 79, 80, 122, 134, 145, 

 224, 406, 407, 414, 419, 421, 428, 

 432, 461, 462, 479; plants, 353, 

 35 6 > 37> 420, 433, 460, 490. 



Utility of nature-study, 12. 



Vegetables, 295, 405. 



Ventilation, 454. 



Viceroy butterfly, 238, 244. 



Vines, 296. 



Violet-tip butterfly, 237. 



Vireo, in, 122. 



Virginia creeper, 341. 



Waahoo, 352. 



Walking stick, 244, 442. 



Warblers, 122. 



Wasp, 205, 457. 



Water, 439, 468, 470, 471. 



Water-fleas, 251. 



Water hyacinth, 167. 



Water milfoil, 167. 



Water power, 485. 



Weather, 469, 486, Chap. XX. 



Weeds, 120, 121, 126, 351, 465, 474. 



492. 



Wheat, 353, 460. 

 Whip-poor-will, 104, 109, no. 

 Wild-flower garden, 282, 297. 

 Wilting of plants, 314. 

 Wind, 486, Chap. XX. 

 Wind pollination, 327. 

 Window-boxes, 284, 297, 420, 433. 

 Window gardening, 283, 284. 

 Wing, 92, 122. 

 Wolf, 419. 



Wood, 307, 358, 463. 

 Woodbine, 341. 

 Wood-lice, 251. 

 Woodpecker, 112, 119, 120, 121, 125, 



126, 143, 221. 

 Wool, 80, 407. 

 Wren, 112, 114, 145. 

 Wrigglers, 211. 



Yearly growth of twigs, 313. 



Yeast, 495. 



Yellow fever and mosquitoes, 213 



