INDEX 



325 



Size class, 28 



Slash disposal, 246, 247, 249 

 Soil, drying of, 87, 113, 120, 125, 

 138 



injury by fire, 240 



preparation of, 112, 128 



protection of, 138, 218, 262 

 South Dakota, 3, 122, 148, 160, 



222, 311 

 Spark arresters, 245, 246 

 Sprout forest, 30 

 Spruce, Engelmann, 51, 66 



European, 33, 136, 153, 159, 

 165, 168, 191, 210 



red, 74, 85, 95, 103, 261, 263, 

 311 

 Stand, defined, 30 



form of, 30 



origin of, 30 

 Standards, coppice with, 184, 185 



number of, 120 



reserving thrifty, 118 



selection of, 119 

 State forestry, 15, 20, 27, 93, 245, 



298 

 Stream flow, disturbance of, 5 

 Strips, alternate cleared, 123 



clear cutting in, 36, 37, 97 



irregular cleared, 128 



location of, 123, 129 



progressive, 132 



shelterwood cuttings in, 37, 

 162 



width of, 124, 164 

 Suppressed trees, defined, 29, 30 

 Surface fire, 226, 236 



Telephone lines, use of, in fire 



protection, 246, 288 

 Thinnings, 190, 196 



grade of, 202 



need of, 198 



practical application of, 212 



Thinnings, repetition of, 208 



results of, 200 



theory of, 201 



time to begin, 204 

 Tolerant species, 63 

 Towers, watch, 286, 295 

 Trace, fire, 275 

 Trails, use of, in fire protection, 



244, 246, 269 

 Trap-trees, 317 

 Trench, 275 

 Tulip-tree, 170, 312 

 Tusayan National Forest, 295 

 Two-storied form, 31 

 Two-storied system, 166, 217 



Underplanting, 168, 218 

 Under-story, 168 

 Underwood, 188, 218 

 Uniform shelterwood cuttings, 



37, 153 

 Unregulated cutting, results of, 5 

 Upper- story, 168 



Value of stand, 10 

 Virgin forest, 50 



Wallowa National Forest, 311 

 Washington, 16, 27, 84, 86, 91, 



298 

 Watch towers, 286, 295 

 Weevil, white pine, 313 

 Whitman National Forest, 311 

 Willow, 171, 172 

 Windfall, 56, 64, 81, 85, 104, 118, 



126, 128, 132, 140, 155, 163, 



204, 216, 319 

 Wings of a fire, 226, 232, 304, 



307 

 Woodlot, 96, 206, 270 

 Wyoming, 3, 139 



