Illustrations 7 



Page 



Pitch pine 206 



Limber pine 206 



Douglas fir 207 



Western yellow pine 207 



White spruce 208 



Black spruce 208 



Western hemlock 209 



Eastern hemlock 209 



Balsam fir 210 



Alpine fir 210 



White cedar 211 



Red cedar 211 



Black walnut 212 



Black gum 212 



Bittemut hickory 213 



Shagbark hickory 213 



Eastern cottonwood 214 



Hackberry 214 



Red alder 215 



Black cottonwood ., 215 



Paper birch 216 



Ironwood 216 



Beech 217 



Butternut 217 



White oak 218 



Red oak 218 



Bur oak 219 



Swamp white oak v 219 



White elm 220 



Rock elm : 220 



Basswood 221 



Sycamore 221 



Kentucky coffeetrec .' 222 



Service-berry 222 



Silver maple 223 



Sugar maple 224 



Manitoba maple 224 



White ash 225 



Black ash 225 



Sumach 226 



Juniper 226 



