| LITERATURE CITED. 
(1) ANONYMOUS. 
1919. Dipping treatment for prevention of sap stain. Jn Timberman, 
v. 20; no. 7, p. 35, illus. 
1919. How to distinguish black ash from commercial white ash lum- 
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Lab.) No. D-11. 
(3) Battery, Invine W. 
1910. Oxidizing enzymes and their relation to “‘sap stain’ in lumber. 
In Bot. Gaz., v. 50, p. 142-147. 
| (4) Berts, HArorp S. 
| 1917. The pousomne of wood. U. S. Dept. Agr. Bul. 552, 28 p., 18 fig., 
8 pl. 
(5) BEAR; Re J: 
1919. Fungi which decay weaveshed roofs. (Abstract.) In Phyto- 
pathology, v. 9, p. 54-55. 
(6) Boycs, J. S. 
1918. Advance rot and latent defects in aeroplane timber. Jn Aerial 
| Age Weekly, v. 7, p. 674-675, 691. Bibliography, p. 691. 
| (7) 1918. Detection of decays. advance rots and other defects in wood. 
| In Bur. Aircraft Production, Inspection Manual, QT-16, 6 p. 
(8) 1920. The dry-rot of incense cedar. U. S. Dept. Agr. Bul. 871, 58 p.. 
3 fig., 3 pl. Literature cited, p. 57-58. 
(9) Brick, C. 
1911. Zythia resinae (Fr.) Karst. als unangenehmer Bauholzpilz. In 
Jahresber. Angew. Bot-, Jahrg. 8, 1910, p. 164-170. Biblio- 
graphical footnotes. 
(10) Brown, H. P. 
1918. Pith-ray fiecks in wood. U. S. Dept. Agr., Forest Serv. Circ. 
215, 15 p., 6 pl. References, p. 14-15. 
(11) Burke, H. E. 
1905. Black check in western hemlock. U.S. Dept. Agr., Bur. Ent. 
Circ. 61, 10 p., 5 fig. 
(12) DUNLAP, FREDERICK. 
1906. Kiln-drying hardwood lumber. U. S. Dept. Agr., Forest Serv. 
Cire. 48, 19 p., 4 fig. 
(18) 1914. Density of wood substance and porosity of wood. Jn Jour. Agr. 
Research, v. 2, p. 423-428. 
(14) ExNeER, WILHELM FRANZ. 
1912. Die technischen Higenschaften der Hélzer. Jn Handbuch der 
Forstw. Aufl. 3, Bd. 2, p. 342-442, 3 fig. Tiibingen. Biblio- 
graphical footnotes. 
(15) Fucus, GILBERT. 
1905. Uber das Ringeln der Spechte und ihr Verhalten gegen die 
kleineren Forstschidlinge. Ix Natiirw. Ztschr. Land-u. 
Forstw., Jahrg. 3, p. 317-341, 7 fig., pl. 7. Bibliographical 
footnotes. 
(16) Grover, H. M. 
1919. Spruce red wood. Jn Indian Forester, v. 45, p. 243-245. 
45 
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