58 



WOOD-USING INDUSTRIES OF CALIFORNIA. 



TABLE 21. MACHINE PARTS. 



MACHINERY AND APPARATUS, ELECTRICAL. 



Eastern maple. New England ; Lake States ; Middle West ; South. 



Of total amount of eastern maple manufactured 1.6 per cent used in 

 this industry. 



Bases for relays; brake-pads; electric cabinets; forms for winding 

 electric coils; telephone wire moldings. 



Close grained; hard; tough; for moldings it will receive screws both 

 endwise and crosswise. 



Rough or surfaced, clear and select, J to 6 inches thick. 

 White oak, plain (eastern oak). Middle West; South. 



Bases for relays ; controllers ; electric battery trays ; electric cabinets. 



Hard; strong; tough. 



Rough or surfaced, -J to 8 inches thick. 

 Siberian oak, plain (Japanese oak}. Japan; Siberia. 



Of total amount of plain Siberian oak manufactured 0.6 per cent 

 used in this industry. 



Electric battery trays and trim. 



Rough, No. 1 and 2, f to 1 inch thick. 

 Black walnut. South; Middle West. 



Of total amount of black walnut manufactured 3.7 per cent used in 

 this industry. 



Electric cabinets. 



Boards, planks and blocks, 1 to 6 inches thick. 



TABLE 22. MACHINERY AND APPARATUS, ELECTRICAL. 



