INDEX 
tion of, on trees, 48; dissemina- 
tion of, 74-76; methods of sow- 
ing, 100, 113-116; hints on 
choosing and testing, 101-118. 
Seed years, 37, 87. 
Selection system of regenera- 
tion, 134-138. 
Sequoia, range of, 81; coppice of, 
141; washingtoniana, 233-235; 
sempervirens, 261. 
Shade, in forests, uses of, 36. 
Shagbark. See Hicoria ovata. 
Sheep, as land clearers, 88, 156; 
use of, in sowing, 115; damage 
caused by, 171-178. 
Shelter trees. See Nurse trees. 
Shoshone Falls, 242. 
Silkworm, 89. 
Siiva, defined, 3. 
Silviculture. See Forestry. 
Sirup, maple. See Maple sugar. 
Sitka spruce. See Picea sitchen- 
sis. 
Slash, cause of fires, 
moval of, 181. 
Smilax, damage caused by, 176. 
Snow, as protector, 106; damage 
eaused by, 165-166. 
Soil, classified, 15-16; formed by 
forests, 46-51; improved by 
forests, 51-56; fixed by forests, 
56-58: reclamation of, 96-97. 
South Dakota, reservations in, 
240-241. 
South, lumbering in the, 
195. 
Sowing, 100, 114-116, 122-123. 
Sparrow, English, damage caused 
by, 169. 
Species, geographical distribu- 
tion of, 69-74; choice of, for 
planting, 94-96. 
Sphagnum moss, use of, in 
nurseries, 124. 
Spice Islands, nutmeg groves in 
the, 216. 
Spruce. See Picea. 
Squirrel, as seed disseminator, 
75, 104. 
159; re- 
193- 
283 
Staked Plains, 238. 
Stand, defined, 2. 
Standard, defined, 141-142. 
Starch, made from carbon diox- 
id, 36. 
State, relation of, to forestry, 
9-11, 150, 159, 248-249. 
Stumpage, defined, 4-5. 
Successive cutting system of re- 
generation, 139-140. 
Sugar-bush, 5, 23. 
Sugar, maple. See Maple sugar. 
Sumac. See Rhus. 
Swamps, how formed, 46-51; 
how improved, 96-97; logging 
in, 194-195. 
Sweet-gum. See Liquidambar. 
Swictenia mahogoni, 224. 
Symbiosis, 38. 
Syrup, maple. 
gar. 
See Maple su- 
Tahoe, Lake. See Lake Tahoe. 
Tamarack. See Lariz. 
Tanning materials, 140, 206-207. 
Tapping, of maple-trees, 201- 
204. 
Tar, how obtained, 208-209. 
Tarodium distichum, 47, 72, 259. 
Teak. See Tectonia grandis. 
Tectonia grandis, in Java, 21; 
value of wood, 187, 223. 
Telephones, in forests, 154. 
Temperature, effect of, on vege- 
tation, T8-82. 
Tennessee, proposed 
park in, 249-250. 
Testing of seed, 108-113. 
Theobroma cacao, how grown, 21, 
129; in Trinidad, 215. 
Thinning, 145-150. 
Thuja, as soil former, 51; occi- 
dentalis, 261; plieata, 261. 
national 
Tilia, seeds of, 74; americana, 
2A. 
Timber, defined, 4; industry, 
186-198. 
Timber-line, 78. 
Torf-beds. See Peat-beds. 
