114 OUR NATIONAL FORESTS 



Pinery as a field for the naval stores industry, it 

 has become more and more important to find other 

 species for this purpose. Consequently the Labor- 

 atory has conducted experiments with the various 

 pines on the National Forests in California, Colo- 

 rado, Arizona, and New Mexico. 



A great many pulp and paper investigations are 

 also conducted by this Laboratory. The large size 

 of the industry and the threatened exhaustion of 

 the native spruce forests which furnish the prin- 

 cipal supply are circumstances which call for in- 

 tensive investigations. About nine-tenths of the 

 paper which we use is made from wood, and the 

 amount of wood which is converted into paper an- 

 nually has reached almost 5,000,000 cords. There 

 are over 2,500 newspapers in the United States, 

 and it is said that a single issue of a New York 

 Sunday paper consumes the trees on about 15 acres 

 of forest. The main object of the work at the 

 Laboratory has been to use other species of wood 

 for the manufacture of paper to offset the fast 

 waning supplies of spruce. Poplar, hemlock, pine 

 and balsam are now being used in considerable 

 quantities. News and wrapping paper has also 

 been successfully made from many National Forest 



