BOTANICAL ASPECTS OF PAPER-PULP AND TANNING INDUSTRIES 533 



and particular wood properties sought by the pulp industry are others. The 

 day may come when pulp fiber, made to order, will be the heritage of the 

 paper-pulp industry from the plant breeder. 



So far as the present writer knows, efforts have not yet been made to in- 

 crease the tannin-yielding quality of any plant. Investigations toward im- 

 proving the domestic industrial sources of tannins have so far been concerned 

 with surveying the wild tannin-yielding plants in southeastern United States, 

 with utilization of Douglas fir bark in the Pacific Northwest, with growing 

 wattle in California, and with the agronomic problems associated with grow- 

 ing canaigre as an annual crop in the American Southwest. 



LITERATURE CITED 



Paper-pulp and tanning 



Brown, N. C. 1919. Forest products — Their manufacture and use. 471 pp. Wiley. 

 New York. 



. 1950. Forest products — The harvesting, processing, and marketing of mate- 

 rials other than lumber, including the principal derivatives, extractives, and in- 

 cidental products in the United States and Canada. 399 pp. Wiley. New York. 



Panshin, a. J., E. S. Harrar, W. J. Baker, and P. B. Proctor. 1950. Forest prod- 

 ucts — Their sources, production, and utilization. 549 pp. McGraw-Hill. New 

 York. 



Stamm, a. J., and E. E. Harris. 1953. Chemical processing of wood. 595 pp. Chemi- 

 cal Publishing. New York. 



Paper-pulp 



Anonymous, 1869. The esparto grass. U.S. Dept. Agric. Rep. Com. Agric. 1868:260- 



267. 



. 1956. New trends are gaining momentum. Pulp and Paper 30(7):60-61. 



Allen, J. H. 1938. History of making pulp and paper in the South. Southern Pulp 



& Paper Jour. 1(1):9-12, 40, 41. 

 Aronovsky, S. I., L. E. Schniepp, and E. C. Lathrop. 1951. Using residues to 



conserve resources. U.S. Dept. Agric. Yearbook 1950-51:829-842 [p. 837]. 

 Bookshire, S. R. 1945. Fine papers from domestic flax — The story of Ecusta. 



Paper Ind. & Paper World 27:543-546. 

 Dodge, C. R. 1897. Useful fiber plants of the world. U.S. Dept. Agric. Fiber Invest. 



Rep. 9. 

 Hunter, D. 1930. Papermaking through eighteen centuries. 358 pp. Rudge. New 



York. 

 . 1947. Papermaking — The history and technique of an ancient craft. 2d ed. 



611 pp. Knopf. New York. 

 . 1952. Papermaking in pioneer America. 178 pp. Univ. of Pa. Press. Phila- 



delphia. 

 IsENBERG, I. H. 1956. Papermaking fibers. Econ. Bot. 10:176-193. 



