INDEX 



283 



Oil emulsion or soluble oil, 177, 179, 



180, 206. 

 Oil, linseed, for grafting-wax, 220. 

 Oil, soluble, or oil emulsion, 177, 179, 



180, 206. 

 Oiling or tarring of roads, 138, 139, 



140. 

 Olmsted, F. L., 75. 

 Ordinances, 155, 273, 275. 

 Orgyia leucostigma, 162. 

 Overhead wires, r46, 150. See Wires. 

 Oxygen, 106. 

 Oyster-shell scale, 176,* 180, 181. 



Palm, desert, 60. 



palmetto, 59,* 60. 

 Parasitic fungi, 191. 

 Paris, 3, 229. 



black locust, 56. 



effect of tarred roads, r39, r4o. 



holes for trees, 64. 



horse-chestnut trees, 42. 



nursery, 228. 



planes, 46. 



regulations for number of rows of 

 trees, 79. 



species used, 10. 



transplanting large trees, 86, 87. 



tree-department, 235. 



watering devices, 108. 

 Paris green, 203, 204, 205. 

 Parking strips, 65. 

 Passaic, N. J., 238. 

 Pavement, 199. 

 Pecan, 59,* 60. 



Pedestrians exposed to dust, 78. 

 Pennsylvania, 238, 244, 258, 273. 



shade-tree laws of, 264, 266. 

 Perth Amboy, N. J., 238. 

 Petroleum, soluble, 206. 

 Philadelphia, planes, 46. 

 Phosphoric acid, in soil, 63, 109. 

 Phyllosticta pavice, 192,* 196. 

 Pine 190. 

 Pittsburg, 236, 238. 



Plagionotus speciosus, 185. 

 Plainfield, N. J., 238. 

 Plane-tree, oriental, 44, 45,* 74, 93, 

 138. 

 heading back, 126,* 127,* 128. 

 street of, 45,* 237.* 



top-pruning, 89, go. 



western, or sycamore, or button- 

 wood, 138. 

 Plant lice, 12, ig, 35, 37, 181, 206. 

 Plantations, renewal of, 229. 

 Planting, 238. 



fall versus spring, 91. 



how, go, gi. 



new street, 231. 



Norway maple, 83.* 



precautions in, 89-93. 



street-trees, 82-101. 



studies preliminary to, 62-81. 



too close, 75. 



too deep, igg. 



with relation to street, 76. 

 Plalanus occidentalis, 46, 197. 



onentalis, 44. 

 Plumule, 103.* 

 Point Pleasant, N. J., 238. 

 Polyporus gilvus, rg3. 



sulphureus, 190. 

 Poplar, 133, 200. 



Carolina, 22, 23,* 24,* 25, 26, 27, 

 44, 74- 



Lombardy, 27, 28. 

 street of, 24.* 



top-pruning, 89. 



tulip, 49. 

 Poplar habit, 27. 

 Populus deltoides, 22. 



-italica, 27. 

 Porthetria dispar, 166. 

 Potash in soil, 63, 109. 

 Power sprayers, 209, 2ro,* 211, 212. 

 Prefect of the Seine, 3, 139, 236. 

 Pruning, 110-135, 231, 232. 



coal-tar, 125 and note. 



dendroscopc, 128, 129.* 



