INDEX 



287 



Ulcers, 142, 143, igg, 200, 201. 



on red maple, 192.* 

 Ulmus amcricana, 38. 



campestn'Sf 41. 

 Uiicinula aceris, 196. 



salicis, 196. 

 Uniform spacing of trees, 76 

 Uniformity, maintenance of 227. 



Vapor, bisulfid of carbon, 207. 

 Vermorel nozzle, 213, 214.* 



Water, 105. 



asph}'xiation by, 199. 



how much, 107. 



part in transpiration and assimila- 

 tion, 105, 106. 



roots lack, 137. 



salt, injuries by, 137, 156.* 

 Watering, 107, 201, 227. 



after transplanting, 107. 



cart, 103,* 108. 



how, 108. 

 Washington, D. C, 2, 3, 234. 



gingkos, 53. 



holes for trees, 64. 



honey locust, 56. 



oaks, 28. 



one species on street, 80. 



A\'ashington, D. C, oriental planes, 44. 



species used, 10. 



staking, 93. 



tree-department, 235. 



tree-guard, 94.* 

 Wax, see Grafting-Wax. 

 Weeks, !M. I., case of, 150. 

 Well around tree, 153,* 154. 

 Westfield, N. J., 238. 

 Whale-oil soap, 179, 180, 181. 

 White heart-rot, 189. 

 Wilkes-Barre, Pa., 23S. 

 Willow, 134, 189. 



powdery mildew, 196. 

 Winter washes for scale insects, 205. 

 Wire guards, 94,* 96. See Guards 



and Guarding. 

 Wires, damages for injuries by, 148, 

 149, 150. 



how to protect branches, 148, 

 148..* 



overhead, injuries by, 141,* 146- 

 1.50, 151.* 

 Woodbury, N. J., 238. 

 Woolly maple scale, 18, 176,* 177. 



"Y's," spray "Y's," 215.* 



Zeuzera pyriiia, 182. 



