INDEX 



347 



Potato spraying, general results of, 



242. 

 , measurement of results, 



243- 

 , results affected by 



manures, 246. 

 Potatoes, early and late planting of, 



337- 



, effect of change of seed, 338. 



, large and small sets, 338. 



Pots used in experiments, 285. 

 Propagation of varieties, 8. 

 Proportional percentages, 23. 

 Pruning, 57. 

 at different times, 76. 



effect of, on growth, 59. 



effect of, on fruiting, 64. 



extremes in, 57. 



in experimental plots, 18. 



manner of, 78. 



necessity for, 67. 



of old and ailing trees, 69. 



root-, 79. 



summer, 76. 



Psylla mail, 221. 

 Pyrethrum, 146, 150. 



euasi-emulsions, 159. 

 uassia, 147. 



Radiation temperatures, 121. 



of heat, 125. 



Rainfall, damage done by exces- 

 sive, 123. 



, effect of, on flocculation of 

 clay, 326. 



, records of, 119, 123. 



Ramming, effect of, on soil, 42. 



trees on planting, 31, 33, 40. 

 Raspberries, manures on, 97. 

 Reed, on frosts, 128. 



Results, comparison of different, 21. 



, expression of, 23. 



, measurement of experimental, 



16. 



.taking means of, 24. 



Richter, on planting, 34. 

 Root-formation after planting, 40. 

 Root-injury on planting, 33, 35. 



to nursery stock, 45. 

 Root-interference of plants, 314. 

 Root-pruning, 34, 45. 



Roots, distribution of new, 53. 



, effect of grass on, 271. 



, function of, 2. 



Russell and Darbishire, on heated 



soils, 253. 

 Russell and Hutchinson, on heated 



soils, 249. 

 Russell, on plant-excretions,3oi, 303. 



Salt, 147, 148, 149, 168, 185, 206. 



San Jos6 scale, 148, 198, 206. 



Sand, planting in, 52. 



, trees grown in, under grass, 



286. 



Saponin, action of, on copper 

 fungicides, 195. 



, wetting effect of, 195. 



Schizoneura lanigera, 219. 



Scion, perpetuation of character- 

 istics of the, 330. 



Seeds, germination of, from dif- 

 ferent apples, 337. 



Shreiner and Lathrop, on heated 

 soils, 258. 



on organic constituents of 



soil, 311. 



Silver leaf, 231. 



, action of, on strong and weak 



trees, 236. 



, inoculation with, at different 



times, 235. 



, , in different parts, 234. 



, methods of combating, 238. 



, spores of different origin 



used, 236. 



, susceptibility of various kinds 



of trees to, 236. 



, treatment with iron sulphate, 



237- 



Smoke clouds, 128. 

 Smudges, 128. 

 Soap, emulsification by, 156. 



, detergent action of, 161. 



, in insecticides, 147. 

 Soaps, for emulsions, 205. 

 Soda, 164. 



, change in, after spraying, 166. 

 Soil, aeration of, 275. 



, analyses of, 26, 81. 



, effect of antiseptics on, 249. 

 , effect of heating on, 249. 



, effect of trenching on, 27. 



gases, 276. 



, nature of, as influencing the 



effect of grass, 270. 



, temperature, 278. 



, weight of, 86 



Solar distillate, 153. 



Spider, red, 148. 



Spraying, effect of rain after, 210. 



for fungi, 13. 



for insects, 13. 



Spring frosts, 124 



Stems of plants, 4. 



Stereum purpureum, 231. 



Stocks, effect of, on the growth of 



trees, 330. 

 , effect of. on the bearing of 



apples, 329. 



Stopping of summer growth, 76. 

 Strawberries, continuous cropping 



with, 336. 



