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STEVENS: PREVALENCE OF ENDOTHIA GYROSA 
Glenn, L. C. Denudation and erosion in the southern Appa- 
lachian region and the Monongahela basin. U.S. Dept. Int. 
Geol. Surv. Professional Paper 72: 1-137. pl. 1-2Z. 1911. 
. Henry, A. J. Rainfall of the United States, with annual seasonal 
and other charts. U. S. Dept. Agr. Weather Bur. Bull. D: 
1-58. pl. r-3-+11 charts. 1897. 
. Livingston, B. E. Physiological temperature indices for the study 
of plant growth in relation to climatic conditions. Physiol. 
Researches 1: 399-420. f. I-4. Ap 1916. 
. Livingston, B. E. & G. J. Temperature coefficients in plant 
geography and climatology. Bot. Gaz. 56: 349-375. f. 1-3. 
N 1913. 
. Shear, C. L., Stevens, N. E., & Tiller, R. J. Endothia parasitica 
and related species. U.S. Dept. Agr. Bull. 390: 1-182. pl. 1-23. 
1917. 
. Spillman, W. J. Agricultural production. U. S. 60th Cong. 2d 
Sess. Sen. Doc. 12 [Rpt. Nat. Conserv. Com. 3]: 257-264. 
. Stevens, N. E. The influence of certain climatic factors on the 
development of Endothia parasitica (Murr.) And. Am. Jour. 
Bot. 4: 1-42. f. 1-3... Ja 1917. 
. Ward, R. de C. Climatic subdivisions of the United States. 
Bull. Amer. Geog. Soc. 477: 672-680. f. 7-5. S 1915. 
. Zon, R. Meteorological observations in connection with botanical 
geography, agriculture, and forestry. Mo. Weather Rev. 42: 
217-223. Ap 1914. 
