REFERENCES. 
( akter, E. E. Silvicultural results of marking timber in the national forests. 
Proc. Soc. Amer. For., Vol. Ill, p. 18, 1908. 
Chapman, H. H. Development of a brush disposal policy for yellow pine 
forests of the Southwest. Jour. For., Vol. XVII, p. 693, 1919. 
Clapp, E. H. Silvicultural systems for western yellow pine. Proc. Soc. Amer. 
For., Vol. VII, p. 168. 1912. 
Dunning, D. Relation of crown size and character to rate of growth and re- 
sponse to cutting in western yellow pine. Jour. For., Vol. XX, No. 
4, p. 379, 1922. 
Fbothingham, E. H. Classifying forest sites by height growth. Jour. For., 
Vol. XIX, No. 4, p. 374, 1921. 
. Height growth as a key to site. Jour. For., Vol. XVI, No. 7, p. 7. r )4. 
1918. 
. Site determination and yield forecasts in the southern Appalachians. 
Jour. For., Vol. XIX, No. 1, p. 1, 1921. 
Gallaheb, W. II. The Himalayan forests. Proc. Soc. Amer. For., Vol. VIII, 
No. 3, p. 333, 1913. 
Hawley, Ralph C. The practice of silviculture. John Wiley & Sons. New 
York, 1921. 
Hopping, Ralph. The entomological aspects of slash disposal. Proc. Soc. 
Amer. For., Vol. X, p. 183, 1915. 
Jabdine, J. T. Efficient regulation of grazing in relation to timber production. 
Jour. For., Vol. XVIII, p. 367, 1920. 
Koch, Elers. The economic aspect of slash disposal. Proc. Soc. Amer. For., 
Vol. IX, p. 356, 1914. 
Long, W. H. A new aspect of brush disposal in Arizona and New Mexico. 
Proc. Soc. Amer. For., Vol. X. p. 383. 1915. 
. Investigation of the rotting of slash in Arkansas. U. S. Dept. Agr., 
Bui. 496, 1917. 
Mitchell, J. A. Methods and costs of brush piling and burning in California. 
Proc. Soc. Amer. For.. Vol VIII, p. 340, 1913. 
Mungeb, T. T. Western yellow pine in Oregon. U. S. Dept. of Agr., Bui. 418, 
1917. 
Nisbet, John. Concerning the enhancement of increment which takes place in 
the forest after heavy thinnings or partial clearance. London, 1893. 
Pearson, G. A. Influence of age and condition of tree upon seed production 
in western yellow pine. U. S. Forest Service, Cir. 196, 1912. 
Roth, Filibert. Concerning site. For. Quart., Vol. 14, No. 1, p. 3, 1916. 
Smith, Kan, and Weitknecht, R. H. Windfall damage in selection cuttings 
in Oregon. Proc. Soc. Amer. For., Vol. X, p. 263. 
Smith, P. T. A silvicultural system for western yellow pine in the Black Hills. 
Proc. Soc. Amer. For., Vol X, p. 294. 
Spakhawk. W. X. Effect of grazing on western yellow-pine reproduction in 
central Idaho. U. S. Dept. Agr., Bui. 738, 1918. 
Watson, Russell. Site determination, classification, and application. Jour. 
For., Vol. XV, No. 5, p. 552, 1917. 
Weidman, R. H. A study of windfall loss of western yellow pine in selection 
cuttings 15 to 30 years old. Jour. For., XVIII, p. 616, 1920. 
Woolsey, T. S., jr. Marking western yellow pine. For. Quart., Vol. VII. p. 
271, 1909. 
Many manuscripts in Forest Service files on methods of cutting, growth, and 
brush disposal bv S. B. Show, R. H. Weidman, J. W. Lowdermilk, 
G. A. Pearson, W. H. Gallaher, R. S. Maddox, S. W. Wynne, X. T. 
Childs, E. G. Dudley, L. T. Larson, and D. Dunning. 
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