INDEX. 



333 



Tree growth affected by light 

 conditions, 13 



Influences of a, 21 

 Tree planting, 44 

 Tree planting on prairies, 44 

 Trees for mixed plantings, 50 



List of, 51 

 Trees protect one another, 14 



Shape of, 7 

 Triangulation, 168 

 Tsuga canadensis, 272 



mertensiana, 272 

 Tulip tree, 296 

 Tupelo, Gum, 302 



Ulmus alata, 294 



americana, 294 



crassifolia, 293 



pubescens, 295 



racemosa, 294 

 Undergrowth in forests, 16 

 Unproductive forest land, 247 

 Uses of wood, 217 



Value of forest industries of 



Minnesota, 242 

 Variations from seeds, 86 

 Virgin forest, 62 

 Volume of felled tree, 170 



of standing timber, 167 



of standing tree, 169 



Wahoo, 294 

 Walnut Family, 280 

 Walnut. Black, 280 



White, 280 

 Washing of soils, 17 

 Waste in forests, 77 

 Water, amount transpired, 33 

 Water capital, Circulating, 23 

 Water capital. Fixed, 23 

 Water, conservation of, 35 

 Water discharged by Rhone, 24 

 Water, Distribution of, 24 

 Water lost by trees in winter, 



amount, 11 

 Water Oak, 293 

 Water supplies, forest influences 



on, 15, 22 

 Water supply in soils, 15 

 Water table in land, Height of, 



40 



Western Catalpa, 305 

 Western Hemlock, 272 

 Western Juniper, 279 

 Western Larch, 269 

 Weymouth Pine, 262 

 White Ash, 304 

 White Basswood, 302 

 White Birch, 285 

 White Cedar, 277, 278 

 White Elm, 294 

 White Fir, 274 

 White Maple, 299 

 White Oak, 288, 289 

 White Pine, 262, 267, 268 

 Crowded and then open- 

 grown, 162 

 Largest cut in Minnesota, 160 

 Largest yield in Minnesota, 



160 

 Open-grown, 164 

 White Spruce, 271 

 White Walnut, 280 

 White Willow, Injured by saw- 

 fly, 134 

 Whitewash, 236 

 Why prairies are treeless, 39 

 Willow Family, 283 



for fuel, 165 

 Willow, Rate of increase, 165 

 Windbreaking power of forests, 



30 

 Windbreaks of White Willow, 



135 

 Windbreaks, 45 ,, 

 Height of, 46 

 Location of, 58, 59 

 Protection to crops, 31, 32 

 Trees, for, 47 

 Wind injuries, 143 

 Wind storms. Forest influences 



on, 37 

 Winds, hot, 42 

 Wing Elm, 294 

 Wintering acorns and other 



nuts, 89 

 Winter injuries, 139 

 Wood and its uses, 217 

 Wood, Durability of, 230 

 Woodenware, 217 

 Woodlot, 78 



Wood pulp and distillation 

 products, 220 



