INDEX 



249 



Populus deltoides, 51 



grandidentata, 54 



nigra, 51, 128 



tremuloides, 54 

 Pores in wood, 227 



small or indistinct, 230 



varying in size, 230 



Poster for private woodlands, 215 

 Precautions against fire, 214 

 Protection against fungi and 



insects, 196 

 Pruning forest trees, 166 



lawn trees, 166 



shade trees, 166 

 , tools used in, 166 

 , too severe, 163 



- trees, fundamental principles, 



160 



time for, 162 



Pussy willow, 59 



Quaking aspen, 54 



Quality of trees, how to judge, 129 



Quality of wood, how to judge, 



233 

 Quercus alba, 72 



- palustris, 79, 119, 125 



platanoides, 74 



- rubra, 76, 124, 126 



velutina, 75 



Red cedar, 225 



and arbor-vitse, description 

 of, 19 



- gum, 95, 231 



horsechestnut, 34 



juniper, 22 



- maple, 41, 120, 125 



mulberry, 105 



- oak, 76, 124, 126 



- pine, 11, 126 



or black oaks, 226 



or sweet gum, 231 



Red spider, 13 

 Redwood, 226 



Removal of dead and broken 

 branches, 162 



of trees, how to mark, 212 

 Requirements of trees, 110 

 Retinospora obtusa, 123 

 Rhytisma acerinum, 41 

 Ring-porous woods, 221, 226 

 Robinia pseudacacia, 100, 126 

 Rock maple, 38 



Roots, 110 



, development of, 110 



, protection of, from drying, 130 



Rust, apple, 22 



Safeguarding forests, 179 



Salix babylonica, 58 



Salix discolor, 59 



Saperda vestita, 98 



Sap-wood, 106 



Sawfly, 27 



Scale, cottony-maple, 39 



, oyster-shell, 53 



Scale-like leaves, 19 



Scarlet oak, 76 



Sciadopitys verticillata, 123 



Scolytus quadrispinosus, 85 



Scotch pine, 9, 11 



Screening trees, 128 



Season, influence of, 116 



Seasons for spraying trees, 137 



Seedling trees, planting forests 



with, 189 



Shade trees, pruning, 163 

 Shagbark hickory, 83 

 Shellbark hickory, 85 

 Silver maple, 38 



poplar, 53 

 Soft maple, 40 



pines, 224 



" Softwoods " or conifers, 224 

 Soil erosion, forests prevent, 187 

 , influence of, on trees, 112 



