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. 

 < )lmsted, F. L., 75. 

 Ordinances, 155, 273, 275. 

 Orgyia leucostigma, 162. 

 Overhead wires, 146, 150. See Wires. 

 Oxygen, 106. 

 Oyster-shell scale, 176,* 180, 1S1. 



Palm, desert, 60. 



palmetto, 59,* 60. 

 Parasitic fungi, 191. 

 Paris, 3, 229. 



black locust, 56. 



effect of tarred roads, 139, 140. 



holes for trees, 64. 



horse-chestnut trees, 42. 



nursery, 22S. 



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, X. J., 23S. 

 Petroleum, soluble, 206. 

 Philadelphia, planes, 46. 

 Phosphoric acid, in soil, 63, 109. 

 Phyllosticta pavia, 102,* 196. 

 Pine 190. 

 Pittsburg, 236, 23S. 



Plagionotus speciosus, 185. 

 Plaintield, X. J., 238. 

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

 138. 

 heading back, 126,* 127,* 128. 

 street of, 45,* Z37.* 



top-pruning, 89, 90. 



western, or sycamore, or button- 

 wood, 138. 

 Plant lice, 12, 19, 35, 37, 1S1, 206. 

 Plantations, renewal of, 229. 

 Planting, 238. 



fall versus spring, 91. 



how, 90, 91. 



new street, 231. 



Norway maple, 83.* 



precautions in, 89-93. 



street-trees, 82-101. 



studies preliminary to, 62-81. 



too close, 75. 



too deep, 199. 



with relation to street, 76. 

 Phitanus occidentalis, 46, 197. 



orientalis, 44. 

 Plumule, 103.* 

 Point Pleasant, X. J., 238. 

 Polyponts gilvus, 193. 



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. 

 Po pubis delta ides, 22. 



italica, 27. 

 Porthetria dispar, 166. 

 Potash in soil, 63, 109. 

 Power sprayers, 209, 210,* 211, 212. 

 Prefect of the Seine, 3, 139, 236. 

 Pruning, 1 10-135, 2 3 x > 2 3 2 - 



coal-tar, 125 and note. 



dendroscope, 12S, 129.* 



