LUMBER CUT OF UNITED STATES, 1870-1920. 



41 



quantity of yellow pine reported, or the ratio of white oak cut to the 

 total. It is not practicable in lumber census work to do more than 

 group the figures for all of the yellow pines together, and treat the 



YELLOW PINE 



DOUGLAS FIR 



OAK 



WESTERN YELLOW PINE 



HEMLOCK 



WHITE PINE 



MAPLE 



GUM 



SPRUCE 



CYPRESS 



REDWOOD 



CHESTNUT 



BIRCH 



LARCH 



YELLOW POPLAR 



BEECH 



WHITE FIR 



CEDAR 



ELM 



BASSWOOD 



TUPELO 



ASH 



COTTONWOOD 



HICKORY 



SUGAR PINE 



BALSAM FIR 



WALNUT 



LODGEPOLE PINE 



SYCAMORE 



MINOR SPECIES 



BILLIONS OF BOARD FEET 



23456789 



COMPUTED TOTAL LUMBER PRODUCTION IN 1920 BY KINDS OF WOOD 



Fig. 14. — The predominance of valuable softwoods in North American forests was one of the reasons for 

 the rapid economic development of the United States. 



oaks, gums, cedars, and other woods in the same way, since no stand- 

 ard classification is found among the lumbermen. Producers in dif- 

 ferent sections frequently apply different local names to the same 

 species, and only confusion would follow an attempt to segregate the 

 figures. 



