INDEX. 



331 



Rock Pine, 206 

 Root growth, Extent of, 4 

 Root formation (Figure 2), 4 

 Roots, 3 



Roots on a forest-grown elm, 121 

 Rotation, Time of, 74 

 Rot in wood, 230 ^ 



Run-off of water, 36 

 Russell's experiments, Effect of 

 wind on evaporation, 30 



Sample acre, 174 



Sample tree, 173 



Sand dunes, 156 



Sap wood, 3 



Saw, 193 



Sawflies, Injuries from, 135 



Sawing methods, 222 



Scaling, 182 



Scarlet Oak, 292 



Schrenk, Dr. C. A., article by, 210 



Scratcher, 193 



Scribner's Rule, 183, 184 



Scrub Pine, 265 



Second growth, 11 



Seed, The, 6 



Evergreen, bed, 95 

 Seeding of timber lands, 03 

 Seeding trees, 1 

 Seedlings, Green Ash, 110 



Variations, 86 



Height of one-year-old, 99 

 Seeds, 6, 84 



amount to use, 97, 98 



classified, 90 



coniferous tree, 94 



covering, 97 



Distribution of, 7 



dry, 93 



fleshy-covered, 93 



Gathering, 87 



Germination of, 87 



Leguminous tree, 94 



Nut, 94 



Number per pound, 98 



Ripening in August, 92 



Ripening in spring and early 

 summer, 90 



Sources of, 84 



Sowing, 92 



Storing of, 92 



Stratification of, 88 



Seeds, Variations from, 86 

 Seed variations, 86 

 Seed years, 63 

 Selection method, 64 

 Sequoia, Giant, 276 

 Sequoia gigantea, 276 



sempervirens, 276 

 Shade -enduring trees, 14 

 Shagbark hickory, 281 

 Shapes of trees, 7 

 Shellbark hickory, 282 

 Shelterbelt, 45 

 Shelterbelts, plans of, 58, 59 

 Ship-building, 219 

 Shortleaf Pine, 264 

 Silver grain, 224 

 Silver Maple, 299 

 Silver Pine, 267 

 Sitka Spruce, 271 

 Size of trees, 54 

 Slash Pine, 264 

 Sleet storms. Injuries from, 144 



Trees after, 142 

 Slippery elm, 295 

 Slope, effect on growth of, 19, 20 

 Snow crust, Injuries from, 144 

 Soft maple, 299 



pruned and unpruned, 125 

 Soil conditions, 15 

 Soil, Improvement of, in wood- 

 lands, 9 

 Soils, Alkali, 18 



Relation of trees to, 15 



Washing of, 17 

 Solar pit, 105 

 Sources of seeds, 84 

 Southern slope. Effect on 



growth, 19 

 Sowing seed, 92 

 Spanish Oak, 292 

 Spotted Oak, 293 

 Spring frosts. Injuries from, 



142 

 Spring growth of wood, 140 

 Spruce, Black, 270 



Engelman, 271 



Red, 270 



Sitka, 271 



White, 271 

 Spruce Pine, 265, 268 

 Spruces, 270 

 Stave Oak, 288 



