444 



TREES IN WINTER 



Scrub : 



Oak 308 



Chestnut Oak 308 



Scurfy scale 167 



Seed: 



Collecting- 47 



Planting- 50 



Propagation from 46 



Storing 48 



Testing 49 



Vitality of 49 



Seedlings, care of 51 



Sequoia gigantea 133 



Service : 



Berry 358 



Tree 354 



Setting the tree 106 



Shad Bush 46, 338 



Shadblow 358 



Shade Tree : 



Insects 154 



Municipal control of 81 



Shag-Bark Hickory 



186, 268, 270, 272 



Shell-bark Hickory 268 



Shrubs 71 



Sign-boards 63 



Silkivorni Mulberry 334 



Silver : 



Birch 282 



Maple . .50, 78, 80, 81, 96, 



132, 143, 145, 191, 402, 404, 406 



Poplar 232, 254, 256 



Spruce 230 



Silver-leaf Poplar 252 



Skunk Spruce 224 



Slippery Elm 322, 326, 328 



Slugs 162 



Small White Birch 286 



Small-fruited Hickory 272 



Small-toothed Aspen 



190, 252, 254, 256, 258 



Smooth : 



Alder 292 



Sumach 390, 392 



Soft: 



Maple 51, 404, 406 



Pine 2L0 



Soil: 



Improving condition of 114 



Injuries from improper condi- 

 tions 132 



Need of humus in 114 



Sorbus americana 354 



Sour: 



Cherry ..184, 362, 364, 368, 370 



Gum 183, 420 



Speckled Alder 292 



Spiney Elm Caterpillar 162 



Spraying 174, 177 



for insects 151 



machinery 178 



Spring Canker Worm 157 



Spruce 



33, 54, 72, 2,01, 214, 236, 238, 248 



Black 101, 166 



216, 222, 224, 226, 228, 236, 242 



Blue 166, 224, 226, 230 



Bog 228 



Cat 224 



Colorado Blue 230 



Double 228 



Douglas 234 



Gall Louse 166, 167 



Hemlock 238 



Key to Species 201 



Labrador 224 



Norway 166, 226, 232 



Pine 214 



Red 224, 226, 228, 23^ 



Silver 230 



Skunk 224 



Swamp 228 



Water 228 



White 166, 224, 226 



Staghorn Sumach 390, 392 



Stakes 110 



Staking the ground for trees ..106 



young trees 110 



Standard Pear 55 



Stem of Tree 38 



Stomach poisons 174 



Storing seeds 48 



Street planting suggestions .... 76 

 Striped Maple ..398, 400, 406, 418 



Structure of tree 31 



Study of tree 11 



Suburban lot 92 



Sucking-insects 166, 178 



Sugar : 



Berry 330 



Maple 14, 15 



16, 17, 27, 36, 48, 50, 78, 81, 122 

 125, 147, 162, 392, 402, 406, 410 



Sumach 208, 392, 394 



Chinese 390 



Dwarf 392 



Key to Species 208 



Poison 186, 392 394 



Smooth 390, 392 



Staghorn 390, 392 



Swamp 394 



Surgery, Tree 134, 140 



Swamp : 



Ash 426 



Bay . 207 



Hickory 274 



Maple 406 



