Flowering, and temperature, 172. 
thermal constant, 191, 226. 
of vine, 257. 
of wheat, 252, 267. 
Food crops, cells of, 16. 
Forest, and change of climate, 296. 
studies, 8. 
temperature variations in, 7. 
thaws, 128. 
Formule, actinometric, Ferrel’s, 88. 
Lambert’s, 84. 
Laplace’s 84. 
Marié-Davy’s, 88. 
evaporation, Fitzgerald’s, 105, 
Russell’s, 106. 
phenological, Bessel’s, 212. 
Kabsch’s, 173. 
Foster, maize, 324-327. 
Fractional parts, law of, 228, 232. 
France, phenology, 278-290. 
rye and wheat, 41. 
Frank, fixation of nitrogen, 157, 159. 
fungi and plant growth, 138. 
Frankfort, Germany, phenological obervations, 
236, 243. 
Frear, maize, 333. 
Freezing, germination at, 33. 
plants and seeds, 338, 340. 
Fritsch, phenological epochs, 167-189. 
phenological experiments, 189-211. 
phenological list, 191. 
phenological predictions, 242. 
Fritz, changes of climate, 295-298. 
Frondescence, 293. 
Frost, and plant development, 237, 252, 256. 
and wheat, 266, 340. 
Fructification, 293. 
Fruit, color and sunlight, 77. 
ripening of, 15. 
Fungi, distribution, 340. 
and plant development, 138. 
Gardner, light and vegetation, 26. 
Garreau, assimilation, 67. 
Gasparin, effective temperature, 170. 
flowering of grape, 257. 
initial temperature, 251, 279. 
phenological epochs, 172. 
phenological list, 172. 
sun temperatures, 39. 
thermal constants, 169, 278. 
wheat, 251, 252, 264. 
wind and vegetation, 129. 
Gautier, nitrifying bacteria, 149, 159. 
Geneva, N. Y., cultivation and bacteria, 108. 
fertilization experiments, 163. 
maize and peas, 335-337. 
plat experiments, 353. 
soil temperatures, 53. 
Geneva, Switzerland, phenology, 186. 
Geography, plant, 40, 238. 
Georgeson, soil temperatures, 54. 
Germany, potatoes, 80. 
Germination, absorption of oxygen, 18, 48, 49. 
albumen, 35. 
beginning, 35. 
light, 37, 42, 52. 
380 
Germination, absorption of moisture, 37. 
temperature, 28-36. 
Germs and.agriculture, 130. 
forests, 130. 
Giessen, Germany, phenology, 236-243. 
phenological calendar, 292. 
Gilbert, evaporation, 245. 
fertilizers, 145. 
nitrogen, fixation of, 151. 
in rain, 135. 
loss by soils, 142. 
sources of, 137. 
plat experiments, 355. 
Girard, rainfall and sugar beets, 126. 
Gluten, in wheat, 41. 
Goff, percolation, 109. 
soil temperatures, 53. 
Goodale, physiological studies, 15. 
Gorlitz, plant development, 231. 
Gossypium, 303-306. 
Grain, acclimatization, 220. 
culture in EKurope, 243-247. 
thermal constants, 73. 
Grandeau, nutrition of plants, 40. 
Grape, and climate, 295-298. 
erop and weather, 256-259. 
water consumption, 13. 
Grasses, acclimatization, 299. 
germination, 307. 
time of harvest, 310, 312. 
water consumption, 118, 119. 
Grasshopper, hatching, 36. 
Grassmann, sugar beets and rainfall, 126. 
Gratiolet, chlorophyl and temperature, 75. 
Gray, phenological observations, 292. 
Green, soil thermometers, 65. 
Greenhouses, 79. 
Greenwich, England, soil temperatures, 58, 59. 
Grignon, France, fertilization, 145. 
‘‘Grébers,’’ Germany, experiment station, 125. 
Groningen, Netherlands, phenology, 186. 
Growth, coefficient, 40. 
factors of, 244-245. 
influence of light and heat, 37. 
plant, 15. 
Guastalla, Italy, phenology, 185. 
Guettard, transpiration, 69. 
Guillemin, light and vegetation, 26. 
Guntz, chlorophyl and climate, 77. 
Guyot, phenological observations, 292. 
Haberlandt, crops and water, 116, 122, 123. 
oats and light, 39. 
soil evaporation, 110. 
wheat, germination, 339. 
Habit, law of, 232. 
Haddonfield, N. J., wheat and temperature, 180. 
Hallett, wheat, 301. 
Halsn6é, Norway, sunshine, 74. 
Hamburg, Germany, plant development, 231. 
Hammond, cotton, 305, 306. 
Harrisburg, Pa., maize experiments, 333. 
Harvard University, botanical experiments, 27. 
Harvest and climate, 364. 
epoch of, 278-290. 
heat and moisture, 23. 
quantity and quality, 23. 
water supply, 116-118. 
