314 
Reforestation, methods of, 67, 
68, 72 
nursery practice in, 69 
Reproduction, artificial, 67 
natural, 65 
seed, 42, 43, 44 
sprout, 46, 66 
sucker, 46 
Sagebrush, 272 
Sawmill, 1382 
mill pond in a, 1382 
seasoning lumber in a, 148 
Seed, dissemination of, 43 
germination of, 44 
production of, 42, 44 
years, 42 
Sequoia, 196, 291 
Service berry, 248 
Shad bush, 248 
Shade trees, care of, 159, 163 
choice of, 161 
list of, 162 
surgery of, 164 
value of, 157 
Shellbark, 204, 293 
Shrubs, 240 
description of, 240 
identification of, 240 
Softwoods, consumption of, 278 
defined, 179 
described, 281, 289 
identification of, 282 
Soil, conservation of, 23 
erosion of, 14, 15, 24, 34 
exhaustion of, 65, 66 
influence of, on durability, 58 
on growth, 38 
influence of forests on, 40 
requirements in, for germin- 
ation, 44 
INDEX 
Spruce, 190, 290 
in paper making, 139 
State forest experiment sta- 
tions, 172, 173 
State forestry, 172 
state-wide education in, 178 
Sycamore, 226 
Sumac, 246 
Sweet bay, 222 
Tamarack, 188, 290 
Thornbush, 268 
Timber estimating, heights, 114 
methods of, 109, 295 
need of, 107 
ocular, 108 
tree contents, 115 
volume table for, and use 
of, 295 
Trees, dimensions of, 289 
enemies of, 102 
felling, 124 
growth requisites of, 37 
identification of, 180 
method of growth of, 4 
parts and functions of, 39 
reproduction of, 42, 46 
shade, 156 
surgery of, 164 
undesirable, 161 
uses of, 289 
need, 64, 65 
Tulip, 224, 293 
Veneer, manufacture of, 145 
Walnut, 202, 291 
Weeks Law, purpose of, 8, 173 
results of, 173 
Willow, 208 
Windbreaks, effect of, 15 
