LITERATURE CITED. 
(1) Boyce. I. S. 
1920. The dry-rot of incense cedar. U. S. Dept. Agr. Bui 871, 58 p.. 3 fig., 
3 pis., 11 tables. Literature cited, p. •" 
(2) Chapman, Herman Haupt. 
1921. Forest mensuration, xxii, 553 p.. 88 fig., 89 tables. New York. 
(3) Collet, R. H. 
1921. The effect of incipient decay on the mechanical properties of airplane 
timber. (Abstract.) In Phytopathology, v. 11, p. -: 
(4) Moller, A. 
1904. Ubei die Xotwendigkeit und Moglichkeit wirksamer Bekampfung des 
Kiefernbaumschwammes Trametes Pini (Thore) Fries. In Ztschr. 
Forst. u. Jagdw., Jahrg. 36., p. 677-715, pi. 4-5. 
(5) U. S. Dept. Agr., Forest Service. 
1916. Instructions for the scaling and measurement of national forest timber. 
94 p., 10 tables. Washington, D. C. 
(6) 1920. Timber depletion, lumber prices, lumber exports, and concentration of 
timber ownership. 71 p., 22 fig., 26 tables. Washington, D 
(7) Weir. James R., and Hubert, Ernest E. 
1918. A study of heart-rot in western hemlock. U. S. Dept. Agr. Bui. "22, 
39 p.. 13 fig. Bibliographical footnotes. 
(8) 1919. A study of the rots of western white pin^. U. S. Dept. Agr. Bui. 799, 
24 p. Bibliographical footnotes. 
19 
