WOOD-USING INDUSTRIES OF CALIFORNIA. 



55 



Western yellow pine (white pine). California. 



Biological cases. 



Rough, clear, 1 to 1J inches thick. 

 Eastern ash (white ash). Middle West; South. 



Of total amount of eastern ash manufactured 0.4 per cent used in 

 this industry. 



Tripod legs on surveying instruments. 



Tough, takes good finish; does not check. 



Rough, first quality, 1J to 2 inches thick. 



American mahogany (west coast mahogany) . South and Central 



America. 



Of total amount of American mahogany manufactured 0.2 per cent 

 used in this industry. 



Surveying instrument cases. 



Strong, stands extremes of heat and cold without distortion. 



Rough, clear, | inch thick. 

 Redwood. California. 



Map cases. 



Light, easily worked. 



Rough, clear, and 1 inch thick. 

 Sugar pine. California. 



Drawing boards ; extension level rods. 



Light, does not check or warp. 



Rough, clear, 1 inch thick. 

 Incense cedar. California. 



This material has proven to be a good wood for the cheaper grades 

 of pencils. Two large pencil manufacturing concerns are now utilizing 

 it for this purpose. 



TABLE 19. INSTRUMENTS, PROFESSIONAL AND SCIENTIFIC. 



