INDEX 



283 



Oil emulsion or soluble oil, 177, 179, 



1 80, 206. 



Oil, linseed, for grafting-wax, 220. 

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



1 80, 206. 

 Oiling or tarring of roads, 138, 139, 



140. 



Olmsted, F. L., 75. 

 Ordinances, 155, 273, 275. 

 Orgyia leucostigma, 162. 

 Overhead wires, 146, 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, 139, 140. 



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, 90. 



western, or sycamore, or button- 

 wood, 138. 



Plant lice, 12, 19, 35, 37, 181, 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. 

 Platanus Occident alis, 46, 197. 



orientalis, 44. 

 Plumule, 103,.* 

 Point Pleasant, N. J., 238. 

 Polyporus gilvus, 193. 



sulphur eus, 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, 210,* 211, 212. 

 Prefect of the Seine, 3, 139, 236. 

 Pruning, 110-135, 231, 232. 



coal-tar, 125 and note. 



dendroscope, 128, 129.* 



