378 
Berlin, phenology, 186. 
Bernina hospice, sun temperatures, 2388. 
Bert, chlorophy] and light, 42. 
Berthelot, ammonia and soils, 138, 139, 159. 
light and vegetation, 38. 
nitrifying bacteria, 147, 151. 
Bertholon, germination, 42. 
Bessel’s formula in phenology, 212. 
Bibliography, 365-375. 
Billings, bacteriology of air, 130. 
Birch, phenology of, 281, 290. 
Birner, potatoes and moisture, 119. 
Black-bulb temperatures, 171, 288. 
Blight, wheat, 268. 
Blooming, see Flowering. 
Bod6, Norway, sunshine and cloudiness, 74. 
Bogota, Colombia, wheat, 180. 
Bohm, chlorophy] and light, 39. 
Boitard, germination, 43. 
Bokhara, Asia, plant development, 231, 282.. 
Bonnier, climate and vegetation, 40. 
Boston, Mass., evaporation experiments, 105. 
Boussingault, assimilation, 75-78. 
coefficient of growth, 40. 
fixation of nitrogen, 147, 155. 
ripening of grain, 73. 
soil nitrogen, 142, 143. 
summation of temperatures, 169, 320-331. 
thermal constants, 169. 
vegetation and light, 37. 
Braunschweig, Germany, phenology, 173. 
Bréal, fixation of nitrogen, 187, 151-154. 
Breslau, Germany, plant development, 217, 220, 
231. 
Brewer, cereals, 300-304. 
wheat, 314-318. 
Briem, beets and potatoes, 309. 
sugar beets and rainfall, 125. 
Broadcast sowing, 337, 355-358. 
Brogniart, germination, 44. 
Brookings, S. Dak., cereals, 318-331. 
soil temperatures, 59, 60. 
Brunswick, Germany, phenology, 178. 
Brussels, Belgium, phenology, 182-186, 213-214. 
Buckwheat, albuminoids and cellulose, 18. 
water content, 116. 
Bunsen, photochemical researches, 92. 
Bunt, wheat, 341. 
Burckhardt, germination, 28. 
Burgundy, France, thermal constants, 257. 
Caldwell, maize experiments, 333. 
Calendar, phenological, 292. 
Caléves, France, harvest and rainfall, 246. 
California, plant growth and cold, 129. 
Campbell-Stokes, sunshine recorder, 99. 
Canada, soil temperatures, 63. 
sunshine recorder, 99. 
thaws and tree growth, 128. 
Candolle, de, beans, 307, 309. 
chlorophyl, 76. 
climatic laboratory, 7, 24. 
germination, 28-36, 43. 
summation of temperatures, 40. 
thermal constants, 278. 
vegetation and light, 39. 
Caracas, Venezuela, thunderstorms and nitrates, 
135. 
Carbohydrates, 17. 
Carbon, assimilation of, 141. 
Carbonic acid gas, absorption by plants, 18. 
decomposition of, 38, 42. 
exhalation of, 49, 50, 51. 
Carlsruhe, Germany, phenology, 186, 235. 
Catalogue of authorities, 365-375. _ 
Catania, Italy, chemical intensity of sunshine, 94. 
Cell structure, 16. 
Cellulose, 16-18. 
Celosia cristata, germination, 28-36. 
Cereals, acclimatization, 300-304. 
albuminoids, 312-314. 
Brookings experiments, 318-331. 
climate and soils, 364. 
limit of cultivation, 187. 
varieties, 251. 
weather, 248. 
Champagne, France, thermal constants, 251. 
Charts, isophenological, 243. 
Chemical measurement of sunshine, 96. 
Chestnut, phenology, 282-290. 
Chile, potatoes in, 80. 
Chinook winds, 128. 
Chiswick, England, radiation temperatures, 235, 
238. 
Chlorophyl, and absorbent media, 77. 
climate, 77. 
formation, 38, 42, 75. 
funetion, 22. 
light and air, 37. 
Christiania, Sweden, acclimatization, 233. 
thermal constants, 217. 
Clausius, sunlight, 81, 82. 
Climate and cereals, 364. 
changes of, 295-298. 
control of, 9. 
favorable and unfavorable, 16. 
influence on crops, 364. 
plant structure, 77. 
sugar beets, 259-263. 
wheat, 251-256, 263-272. 
vegetation, 188, 244, 245. 
Climatic laboratory, 7, 24-27. 
Climatic tables, for phenological study, 272-277. 
Climatic zones, 221, 224. 
Climatology, 15. 
Cloéz, chlorophyl, 75. 
Cloudiness, and absorption of carbonic acid 
gas, 47. 
actinometry, 90. 
data for phenology, 273. 
soil temperature, 21. 
Clover, albuminoids, 18. 
fertilization by, 158. 
fixation of nitrogen, 160. 
water consumption, 113, 119. 
Codazzi, thermal constants, 170. 
Coefficient of growth, 40. 
Colin, germination, 33,37. 
thermal constants, 170. 
Collomia coccinea, germination, 28-36. 
Colombia, wheat, 180. 
Columbia, S.C., prize corn crop, 165. 
