252 



INDEX 



Trees, yew, 57 



Tsuji;a canailcnsis, 17, 128 



Tulip poplar, 92 



— tree, 90, 120, 231 

 Tussock moth, 143 



Ulinus amcricana, 47, 119, 125, 

 12G 



— cainpestris, 50 

 Ihnbrella i)iiu', Japanese, 123 



— tree, 100 



Value of jilant study for cliililreu, 

 235 



— of tree and nature study, 235 



— of trees as health givers and 



moral uplifters, 237 



Walnut, 83 



— , black, 87 



Wasteful lumbering, 193 



Weeping willow tree, 46, 59 



Western catalpa, 104 



Whale-oil soap, 139 



White ash, 35, 126, 227 



— birch, European, 68, 120 



— cedar, 24 



— elm, 50 



— flowering dogwood, 104 

 \Miiteheart hickory, 87 

 White maple, 40 



— mulberry, 105 



— oak, 72 



— oak, swamp, 74 



• — or gray birch, 64 



— pine, 4, 122, 126, 



— pine weevil, 4 



— poplar, 53 



— spruce, 15 

 Whitewood, 92, 98, 231 

 Willow, weeping, 58 

 — , pussy, 59 



Wood, diffuse-porous, 221, 233 

 ^, diseased, disposal of, 212 



Wood, early, 220 



— fibers, 222 



— , how to identify specimens, 222 

 — , how to judge quality of, 2'.y.] 

 — , late, 220 



— medullary rays, 220 



— l)arenchyma, 222 



— resin ducts, 222 

 — , ring-porous, 221 



— spring, 220 



— , structure, of, 217 



— summer, 220 

 Woodland, care of the, 203 



— how to improve by removing 



trees, 211 



— how to judge, unfavorable 



conditions, 203 



— trees, 126 



Woodlands, other means of pro- 

 tecting, 216 



^\'oodlot, small cost of well- 

 selected young trees for the, 

 208 



Wood, structure of, 217 



Wooded areas improved by ],lant- 

 ing new trees, 207 



— areas, preserving soil of, 206 

 AVoods, identification, i)roi)erties 



and uses of common, 217 

 — ; ring-porous, 221, 226 



— with large and conspicuous 



rays, 226 



— with pores, 226 



— with resin ducst, 224 



— with small and inconspicuous 



rays, 227 

 — ■ without pores, 224 



— without resin ducts, 225 

 Wounds, importance of covering, 



164 

 — , methods of covering, 164 

 — , treating surface, 168 



Xerophytes, 111 



