Index 
Sambacus, Elderberry, 328, 336, 338, 
339, 366, 368-371 
San José scale, 151 
Sandy soil, trees suitable for, 372 
Sap-lifters, 108 
Sap-wood trees, 1712 
Saprophytes, 36, 41, 43 
Saratoga, cost of spraying in, r4r 
Sargent, Prof. C. S., definition of 
tree adopted by, 209 
Sascatoon Berry, Alnus, 275 
Sassafras, 213. 316, 367, 372 
Saunders, Dr. William, on tests of 
hardiness in trees, 200 
Saw-flies, 48, 230; see also Insect 
pests 
SAXIFRAGACEAE, Stonebreak 
family, 352 
Scale-insects, 134, I41, 150; see also 
Insect pests 
Scheele’s Green, 137 
Scotch Broom, Cylisus, 346 
Scotch Heather, Culluna, 331 
Seashore planting, trees suitable for, 
242, 249, 284, 317, 330, 341, 
343, 349, 356, 362, 371; also List, 
p. 371 
Seasons, influence of, on disease, 
34 
Seed, preserving characteristics of 
mother plant, 24; inheritance of 
adaptability, 34 
Senecio, 37 
Sequoia, 210, 215, 222 
Service-berry, 56 
Service-tree, Sorbus, 192, 263, 264 
Sesias, 158 
Seventeen-year locust, see Cicada 
Shadbush, Amelanchier, 111, 211, 
273, 369, 370, 372 
Shade, effect on weak trees, 25; 
value of, 200, affected by soil 
205, see also Light 
Shade-enduring trees, 215, 218, 232, 
234, 264, 267, 276-278, 281, 284, 
287, 288, 323, 330, 332, 337, 354; 
359, 361, also List, p. 370 
Shade trees, adverse conditions in 
streets, 33; treatment of soil for, 
77; reasons for pruning, 98; height 
of crown from ground, ror 
Shagbark, Iicoria, 257 
Shapes of trees, see Types of trees 
389 
Sheepberry, Viburnum, 340, 366 
Shellbark, Hicoria, 256, 257 
Shepherdia, Buffalo Berry, 328, 344. 
306, 368, 369, 372 
Shoulder, 88 
Shrubs, adaptability, 322; hardiness, 
323, 325; freedom from pests, 
323; grouping, 324; pruning, 325; 
classification, 326 
Shrubs and trees, confusion between, 
208, 322 
Siberian Crab-apple, 295 
Siberian Pea Tree, Caragana, 210, 
252, 368, 370, 372 
Silkworm, 158, 201 
Silver Bell Tree, Halesia, 111, 327, 
354, 369, 370 
Silver Tree, Hl@agnus, 327, 341, 342. 
306, 369 
Slacked lime, see Lime 
Smith, Prof. J. B., referred to, 149 
Smoke, cause of disease, 68; symp- 
toms of poison by, 69; suppression 
of nuisance, 70 
Smoke-resistant trees, 69; also List, 
P- 370 
Smoke Tree, Rhus, 262 
Snout-beetles, 152 
Snow-pressure damage from, 31 
Snowball, Viburnum, 192, 324, 320, 
336, 339-341, 366-373; Chinese, 
340 
Snowdrop, Halesia, 111, 327, 384, 
309, 370 
Soap, Soft, 163 
Soap solution, 141, 142, 148, 150, 
153, 154, 160; see also Insecticides 
Soil, relation to root system, 15, 
16; respiration, 20; adaptation to 
species, 24, 198; important factor 
in city streets, 33; symptoms 
of unfavorable conditions, 53, 
changes in, 57, 58; physically 
wet, physiologically dry, 61; 
chemical constituents, 62, 70; 
treatment of for shade and lawn 
trees, 77; composition of versus 
physical conditions, 198, 199; 
needed depth, r99; for transplant- 
ing, 172; influence on form, 204, 
205; conditions for coniferous 
trees, 214 
Soldiers’ Home, Washington, 186 
