256 INDEX 
Selected List ( Continued). Pepper Tree, 67 
Pin Oak, 46 
Red Maple, 59 
Red Oak, 45 
Scarlet Oak, 47 
Silver Maple, 61 
Sugar Maple, 60 
Sweet Gum, 56 
Sycamore, 53 
The Conifers, 65 
Tulip Tree, 55 
Valley Oak, 49 
White Oak, 47 
White Ash, 57 
Willow Oak, 48 
Shade tree’s struggle for existence, 183 
Shagbark Hickory, 105 
Shakespeare Memorial Oak, 125 
Shears, Pruning, 147 
Shellac for protecting wounds, 144 
For waterproofing surfaces, 144 
Shelter, Trees for, 93 
Sherman Sequoia, General, 120 
Sherrill labels capital’s trees, Col., 129 
Shoestrings are symptoms of root-rot, 175 
Shrubs for roadsides, 93 
Sidewalk planting, 69 
Silver Maple, 61 
Slime-flux, Description and treatment of, 
x 75 
Smoke injures trees, 169 
Soap spray, Fish-oil, 191 
So-called “Tree Surgeons,” 156 
Sodium arsenite, 191 
Soft-coal smoke injures trees, 169 
Soil cultivation at base of trees, 133 
For newly planted tree, 81 
How to enrich, 133, 196 
Requirements for proper tree growth, 
J 33 
Shade trees planted in cultivated, 233 
Treatment of gas-filled, 168 
Requirements of Beech, 106 
Sources of injury to street trees, 149 
Southern roads, Trees suitable for, 92 
Spacing distances in planting, 74 
Spacing of roadside trees, 93 
Spiny elm caterpillar, 202, 218 
Spot, Leaf, 180 
Sprayers, Power, 193 
Spraying accessories, 194 
Spraying apparatus, Community owner¬ 
ship of, 185 
Various kinds of, 192 
Spraying mature street trees, 193 
To control foliage fungus, 177 
Spray pumps, Uses of various types, 193 
Sprays, Contact, 188 
Lime sulphur, 189 
Sprays, Kerosene emulsion, 189 
Creosote oil, 190 
Miscible oils, 190 
Nicotine sulphate, 191 
Fish-oil soap, 191 
Poisoned contact, 191 
Carbon disulphid, 191 
Sodium arsenite, 191 
Square-foot basal measurement method, 
235 
Square-inch basal area method, 236 
Stag-head or top-dry, How to treat, 182 
State entomologists, 184 
State laws penalizing tree damage, 233 
Sterilization of cavities, 162 
Sterilizing wounds, 145 
Stomach poisons, Formula for, 188 
Street in shade tree valuation, Effect of, 
232 
Street tree location, 68 
Street tree planting, Two row type, 68 
Center and side planting, 71 
The center strip, 72 
The potted type, 73 
The informal type, 73 
Center and side planting, 71 
Street trees, Abuses, 134 
Proper location of, 68 
Spraying mature, 193 
Underground irrigation of, 132 
Streets, Trees for wide and narrow, 42 
Sucking insects, Sap, 197 
Sugar maple, 32, 60 
Borer, 212 
Suits, Verdicts in tree damage, 234 
Sulphate, Nicotine, 191 
Sulphur bleaching dangerous to trees, 170 
Sulphur spray, Lime, 189 
Sun-scald, 155 
Surgical work on trees, 157 
Sweet Gum, 56 
Sycamore, 53 
California, 55 
For roadside planting, 92 
Identifying characters, 34 
Lace bug, 221 
Principal insects which attack: bag- 
worm, 221; White-marked Tussock 
moth, 221; lace-bug, 221 
Various names, 34 
Maple, 34 
Table, Tree planting, 88 
Taxes, Nut trees pay, 99 
Temperature, How trees affect, 21 
Tent caterpillar, Forest, 203 
Terrapin scale, 214 
Title of shade tree executive, 229 
Toadstools, 173 
