INDEX. 



197 



Trees— Continued. 



teiuiicrature of Genova observations, 72. 

 ditiereuce of tt'niix'iatiire between trees and 

 air, 74. 



(See also Temperature, Transpiration, and 

 P>aporation.) 

 condensers of aqueous vapor, dew, and hoar 



frost, 121, 124. 

 interception of rainfall by, 130. 

 amount of water in, V,i6. 

 Vegetation : 



relation t^ and eti'eets on lieat and water, 76. 

 amount of heat and water absorlied by, 7C. 

 etiects of absorption on elimate, 76, 77, 78. 

 efieets on air temi)eratui-e, 76. 

 table showing estimated amount of trans- 

 piration, evaporation, and precipitation of 

 various i>laiits, 78. 

 theoretical calculation of lieat absorbed by, 

 80. 

 Vines, Dr., table showing effects of sunlight on 



transpiration of plants, 77. 

 "Water: 



amount caught by rain gan^es, 17. 

 evaporation affecting air temperatures, 81. 

 Waters, terrestrial, distribution of, 141. 

 Water conditions, inlluence of forests upon, 20. 

 "Water capacity and eomluctivily of soils and soil- 

 covers, 140, 144. 

 Water flow, influence of forests upon, examples, 



158. 

 Water management, its connection with forest 

 management, 12. 



Water supply : 

 the total, 123. 



influence of forests upon the disposition of, 130. 

 interception, 130. 

 evaporation, 1S2. 

 transiuration, 136. 

 elements of conservation. 137. 

 efieets of forest in the case of snow, 137. 

 gener.ll eti'ect of forests in reducing evapora- 

 tion, 138. 

 summation of the conservative and dissipa- 



tive inrtnenees, 140. 

 formiition of sprin;^s and condiiions afifecting 

 their flow, 153. 



{See alio Evaporation, Eainfall, etc.) 

 Weather Bureau, memorial pf the A. A. A. S. to 

 the Secretary of Agricultiirein reuard to, 11. 

 Weather, clear and cloudy, etiects on tempL-rature 



in glades and plains, 87. 

 Wind and storms, protection afforded by forests, 



118. 

 Windbrealvs, effects of, upon crops, 118, 134. 

 Woeikofl", Dr.: 



on influence of snow-covering on climate, 23. 

 temperatiue, in wooded and treeless terri- 

 tories, 91. 

 on parallels of latitude, 92. 

 influence of forests on rainfalls, llj. 

 Wood, as a conductor of heat, 74. 

 Woods, temperatures in, 83. 

 (See also Temperature.) 

 Wooded districts, iireeipit.ition in, 111. 

 Wooded territories, temperatures in, 87 



