BOTANICAL ASPECTS OF PAPER-PULP AND TANNING INDUSTRIES 535 



United States. Jour. Amer. Leath. Chem. Soc. 37:340-356; 38:30-34, 144-148, 



235-238, 355-358; 39:173-178; 40:110-121. 

 Smoot, C. L., and R. W. Frey. 1937. Western hemlock bark, an important potential 



tanning material. U.S. Dept. Agric. Tech. Bull. 566. 

 Snow, E. A. 1952. Oak slabs and cordwood as a source of tannin and pulp. Jour. 



Amer. Leath. Chem. Assoc. 47:563. 

 AND L. F. Bailey. 1949. Tannin from oak slabs. Jour. Amer. Leath. Chem. 



Assoc. 44:737. 

 Watson, M. A. 1950. Economics of cattlehide leather tanning. 248 pp. Rumpf Pub. 



Co. New York. 



