385 



statistical mothod in botany, 7. 



Stettin, Genniiny, phenology, ISti. 



Stone, sorghum, 337. 



Stnu'ture of seeds, 35. 



Sturtevant, cultivation and evaporation, lOS. 



pepper, 307. 



range of plants, 9. 



thermal constants, 335-337. 

 Stuttgart, Germany, acclimatization, 220, 233. 

 Sugar beets, and climate, 2.59-2G3. 



rainfall, 125. 



time of harvest, 310. 

 Sugar crop and rain, Barbados, 344-350. 



climate, 303. 

 Summation of temperature, 279-290. 

 Sunshine and absorption by seeds, 47, 48. 



assimilation, 67-80. 



chlorophyl, 75. 



diminution, 99. 



distribution, 72. 



dust and diffused sunshine, 81. 



effects, 22. 



hour degrees, 74. 



latitude, 244. 



measurement, 22, 81-103. 



Montsouris, 89, 90. 



photochemical intensity, 92. 



photographic measurement, 95. 



plant development, 160, 244, 247. 



recorder, 21. 



records, 99, 100. 



ripening of grain, 73. 



soil temperatures, 20. 



sugar beets, 259. 



total possible, 101-103, 219. 



transpiration, 69. 



wheat crops, 255. 

 Sun temperatures, 238. 

 Surface slope and soil temperature, 67. 

 Sweden, phenology, 186. 

 Switzerland, acclimatization of grains, 220. 

 Symbiotic life, 138. 



Tables of possible sunshine, 101-103. 

 Taimyr, Siberia, grasses, 299. 

 Temperature, black bulb, 171. 



chlorophyl, 38. 



effective, 170. 



germination, 28-36. 



ineffective, 36. 



low, and vegetation, 338-340. 



phenology, 211, 273. 



plant development, 19, 168, 211, 234, 236, 239. 



respiration, 19, 48, 50. 



soil, 20, 53-66. 



sugar beets, 260. 



summation, 279-290. 



wheat crop, 341-343. 

 Tenerifle, botanical garden, 221. 

 Tessier, light and vegetation, 6. 

 Thaws and plant life, 128, 237. 

 Theory of compensation, 219. 

 Theory of errors in agriculture, ;5.53, 354. 

 Thermal constants, 168, 189-191, 236-243, 278-290, 

 320-331. 



barley, 319. 



grape, 25&-2.59. 



Thermal constants, ninize, 336. 



oats, 320. 



peas, 336. 



wheat, 251-256, 265, 267, 278, 319. 

 Thermoelectric aetinometer, 99. 

 Thermoelectric sun.shine recorder, 97. 

 Thermometer, soil, 21, 65, 66. 

 Thcrmometric constants and plant growth, 168. 

 Thcrmometric measurement of sunshine, 83-92, 



96. 

 Thermophone, 65. • 



Thorpe, insolation measurements, 82. 



photochemical researches, 94. 

 Thunderstorms, and .souring of milk, 341. 



and nitrates, 135. 

 Thuija, chlorophyl and light, 38. 

 TiUacuropcxn, Tllin ^ilvcittrif, phenology, 281. 

 Timiriazeff, chlofophyl, 38, 41. 

 Timothy, cellulose, 18. 



time of harvest, 310. 

 Tisserand, grain culture in Europe, 243-247. 



light and vegetation, 41. 



sun.shine and prain, 73. 



vegetation in high latitudes, 40. 

 Tokyo, Japan, soil temperature, 54. 

 Tomaschek, thermal eon.stants, 173. 

 Transmission of solar heat, 92. 

 Transpiration, 19, 112. 



diurnal periodicity, 70. 



plant temperature, 53. 



and .sunshine, 67-80. 

 Treadwell, souring of milk, 341. 

 Trees and rapid thaws, 128. 

 Trifoliiun repent, germination, 28-36. 

 Tubercles, on nitrogen-fixing plants, 136, 137. 

 Tubers, dryness and sunlight, 80. 



Ultraviolet light and plant growth, 80. 

 United States, average wheat crop, 179: 



crops and climates, 351-364. 



evaporation, 107. 



phenology, 186. 

 Upsala, Sweden, germination of wheal, 39. 



phenological observations, 241-242. 



Valognes, France, epoch of awakening, 185. 

 Van Tieghem, phenological constants, 179. 

 Vegetation, anpual progress, 183. 



beginning of, 238. 



climatic factors, 188. 



development of, 232. 



high latitudes, 40. 



Lin.sser's law, 214, 215. 



thermoscope, 174. 



wind, 129. 



zones, 224. 

 Venice, Italy, phenology, 185. 



plant development, -M. 



sunshine, 219. 

 Vienna, Austria, phenology, 189, 190. 



plant development, 231. 



thermal constants, 238. 

 Ville, atmospheric ammonia, 144. 



fertil ization by clover, 158. 



fixation of nitrogen, 146, 1.53, 155, 1.59. 



germination, 44. 

 Vilmorin, thermometer expo.sure, 176. 



2667—05 M- 



-25 



