VENEERS 



103 



as described in connection with sliced veneers. Drying is practiced in 

 the same manner as that followed with sliced veneers. 



BUILT-UP STOCK 



The manufacture of built-up stock made of 3-, 5- or 7-ply material 

 has really become a separate industry of great magnitude within compara- 

 tively recent years. Its demands on veneer as its raw material have 

 increased very rapidly and explain to some extent the greatly increased 

 production of rotary cut veneers. Plants turning out various forms of 



Photograph by U. S. Forest Service. 



Fig. 21. — Sheets of veneered heading used for barrels. These are piled for cooling after 

 drying and are then taken to the glueing room. Poplar Bluff, Missouri. 



built-up material may be found in connection with rotary veneer mills 

 or in operation entirely independent of the veneer factory. 



The principal fields of usefulness for built-up ' or laminated stock are 

 the following: panels, doors, aeroplanes, furniture, trunk stock, interior 

 finish and many articles of both a utilitarian and an ornamental nature. It 

 is even coming to be a strong competitor of lumber for many of its common 



^ The U. S. Forest Service laboratory at Madison, Wis., has made great strides 

 during the war in the perfection of built-up stock and glues used in aeroplanes and 

 hydroplanes. 



