Leone, nitrification, 160. 
sources of nitrogen, 160. 
Lepidium sativum, germination, 28-36. 
Leyst, earth temperatures, 65. 
Libbey, sunshine tables, 101, 102. 
Light, and absorption of oxygen, 47, 48, 50, 51. 
germination, 37, 42-52. 
Pauchon’s experiments, 45. 
respiration, 19. 
vegetation, 26, 40, 79, 80. 
Lightning and fixation of nitrogen, 135. 
Lilac, phenology of, 280-290. 
Limit of cultivation, 187. 
Linden, phenology, 281-290. 
Linsser, laws of acclimatization, 7, 215, 242. 
phenological studies, 6, 211-234. 
sunlight and vegetation, 218, 219. 
thermal constants, 173. 
zones, 224. 
Linum usitatissimum, germination, 28-36. 
Lippincott, dates of sowing and harvest, 359-361. 
phenology of wheat, 179. 
Lisbon, Portugal, intensity of sunshine, 94. 
photochemical researches, 94. 
Lobositz, Austria, rainfall and harvest, 111 
Locality, influence on vegetation, 183. 
Lonicera alpigena, phenology, 237. 
Lucerne, fixation of nitrogen, 187, 153. 
water consumption, 113. 
Lucimeter, Bellani, 99, 278. 
Lupin, fixation of nitrogen, 153, 160. 
Lynden (North Cape) Norway, wheat, 39 
gluten in wheat, 41. 
McLeod, soil temperatures, 63. 
Madeira, seasons, 221-232. 
Maize, acclimatization, 220. 
albuminoids, 18. 
date of ripening, 125. 
environment, 314. 
experiments with, 321-334. 
fertilizers, 162. 
thermal constants, 335-337. 
Manche, France, climate and crops, 175. 
Manchester, England, insolation, 82. 
photochemical action of daylight, 93. 
Mangon, chlorophy], 76. 
initial temperatures, 279. 
thermal constants, 174, 252, 265. 
Manitoba, Canada, forest experiments, 128. 
Manures, 162-166. 
and crops, 121. 
soil temperatures, 54. 
Maquenne, nitrogen and vegetation, 139. 
Marcano, lightning and nitrogen, 135. 
Marchand, actinometer, 96, 273. 
shade and plant development, 79. 
Marié-Davy, acclimatization of plants, 41. 
actinometer, 273. 
actinometric results, 96. 
ehlorophy], 75. 
maize, 170. 
meteorology and crops, 247-251. 
phenological constant, 176, 177. 
phenological researches, 243-277. 
prediction of harvest, 178. 
radiation, measurement, 81. 
sunshine and transpiration, 69, 70, 113. 
382 
Marié-Davy, water and crops, 246. 
Martins, thermal constant, 278. 
Martins, von, light and vegetation, 27. 
Marvin, sunshine recorder, 99. 
Mascagno, light and assimilation, 78. 
Matotschkin-Schar, Nova Zembla, acclimatiza- 
tion, 216. 
thermal constants, 216. 
Maurer, soil temperatures, 21. 
Maximum temperature of germination, 34. 
Mecklenburg, Germany, water and plant develop- 
ment, 119. 
Meech, sunshine tables, 101. 
Meigs, phenology, 292. 
Melon (canteloupe), germination, 28-36. 
Mendenhall, soil thermometers, 66. 
Meteorology and crops, 247-251. 
Mexico, origin of maize, 234, 
Meyen, germination, 44. 
Michael, botanical classification, 68. 
Miesse, germination and light, 42. 
Mikosh, chlorophyl, 38. 
Milk, souring, 341. 
Millet, silkworms, 36. 
Minimum temperature of germination, 33, 34, 3385. 
Miquel, collection of germs, 131. 
Modification of plants, 233. 
Moisson, respiration of plants, 18. 
Moisture and germination, 37. 
plant development, 222. 
records, 273. 
soil, 20, 104, 110-111. 
Moleschott, light and vegetation, 37, 39. 
Montreal, Canada, soil temperatures, 63, 64. 
Montrouge, France, flowering of wheat, 178. 
Montsouris, France, actinometric percentages, 87. 
actinometric degrees, 89, 96. 
atmospheric electricity, 131, 182. 
bacteriology of air, 130, 131. 
Bellani lucimeter, 98. 
evaporation data, 105, 106. 
insolation and transpiration, 71. 
intensity of sunshine, 89. 
nitrogen in rain, 133, 134. 
researches, 243, 277. 
variations in atmospheric air, 133. 
Morley, variations in atmospheric air, 133. 
Morren, acclimatization, 220. 
germination, 43. 
phenology, 167. 
Mulder, protein, 17. 
Munich, phenology, 186. 
soil temperatures, 54, 55, 57. 
Miintz, fixation of nitrogen by lightning, 135. 
nitrifying ferment, 142. 
Miittrich, forestry, 7. 
Naples, phenology, 184, 185. 
Narcissus, phenology, 280, 282. 
Nertchinsk, Siberia, cereals, 187. 
New York State, maize experiments, 332, 333. 
phenological observations, 235, 292. 
Nigella sativa, germination, 28-36. 
Nitrates in sugar beets, 262. 
Nitrogen, artificial fertilizers, 162. 
fixation by plants, 136-161. 
by soils, 139. 
in rain, 1383-135, 
