INDEX. 



303 



Nuclear protoplasm, 271, 279, 



280, 290. 

 Nuclear substance, 71. 

 Nucleo-plasm, 280. 

 Nuts, 248. 



Oak, no, 188, 215, 218, 219, 



223, 233. 

 Oak leaf-roller, 254. 

 Oat, 176. 



Occlusion, 200, 201, 222, 223. 

 Odours, 144. 

 Oedema, 228. 

 Olive, 223. 

 Onion, 231. 

 Onisais, 182. 

 Oospora, 216. 



Optimum temperature, 105, 288. 

 Orange, 173, 187, 235, 247. 

 Orange-coloured spots, 187. 

 Orchard trees, 163. 

 Orchestes, 206. 

 Orchids, 1 13, 266. 

 Organic acids, 50. 

 Organisation, 89. 

 Organised structure, 13. 

 Organisms in soil, 60. 

 Orobanche, 1 12. 

 Osmosis, 26, 29, 46. 

 Osmotic pressures, 18, 41, 52. 

 Over-crowding, 104, in. 

 Over-feeding, 102. 

 Over-watering, 97. 

 Oxalic acid, 134, 136. 

 Oxidation, 124. 

 Oxygen, 104, 272. 

 Oxygen-respiration, 12, 64. 



Pallor, 179, 180. 



Palms, 192. 



Panghim, 134, 165. 



Parasites, 61, 113, 119, 130, 



139, 174, 187, 230, 265, 269, 



284. 

 Parasitic algae, 188, 217, 219. 

 Parasitic bacteria, 163. 

 Parasitic diseases, 88, 119, 121. 

 Parasitic epiphyte, 136. 

 Parasitic fungi, 87, 97. 

 Parasitism, 262, 264, 268, 271. 

 Paris, 175. 

 " Paris green," 162. 

 Parti-coloured leaves, 191. 

 Parti-coloured spots, 186. 

 Pasture grasses, 69. 

 Pathology, 121, 257. 

 Pathology of cell, 119. 

 Pathological conditions, 168, 170, 



246. 

 Pea, 190, 191, 206, 208, 248, 



268. 

 Peach, 170, 253. 

 Pear, 179, 187, 189, 191, 216, 



218, 231, 240, 248, 249, 253, 



257. 

 Pedigree wheats, 69. 

 Pelargonium, 198, 253. 

 Peloria, 252. 

 Peji icilliii III, 231. 

 Peridennium Pint, 223, 234. 

 Periola, 238. 

 Permangate, 162. 

 Peronospora, 136, 160, 175) '^7 



189, 208. 

 Petasites, 188. 

 Petroleum, 162. 

 Peziza, 1 15, 144, 152. 

 Phanerogams, 108, in. 



