An Ecological Study of Buckeye Lake. 137 



47. Mather, K. F. 



Age of Licking Narrows. Bull. Denison Univ. 14 : 

 174-187, i9o8-'o9. 



48. POTONIE, H. 



Die Entstehung der Steinkohle. Berlin, 1910. 



49. Read, M. C. 



Geology of Licking Co., (Ohio). Geol. Survey of Ohio, 

 3: 348-361, 1878. 



50. Reed, Howard N. 



A survey of the Huron river valley. I. The ecology 

 of a glacial lake. Bot. Gaz. 34:125-139. Aug, 1902. 



51. ScHAFFNER, JoHN H., Jennings, O. E., and Tyler, E. J. 



Ecological study of Brush Lake. Proc. Ohio State 

 Acad. Sci., 4: 4, Special paper 10, 1904. 



52. SCHIMPER, A. E. W. 



Pflanzengeographie. Jena, 1898. 



53. Shreve, Forest; Chrysler, M. A.; Blodget, Frederick 



and Besley, F. W. 

 The plant life of Maryland. Md. Weather Bureau, 

 Spec. pub. 3 : 1910. 



54. Smith, W. G. 



The origin and development of heather moorland, Scott. 

 Geog. Mag. 18: 587-597. 1902. 



55. Spalding, V. M. 



Problems of local distribution in arid regions. (Present 

 problems in plant ecology.) Am. Nat. 43: 472-486, 

 1909. 



56. Tight, W. G. 



Drainage modifications in southeastern Ohio and adja- 

 cent parts of West Virginia and Kentucky, U. C. Geol. 

 Survey, Prof, paper 13. 



57- 



A contribution to the knowledge of the pre-glacial 

 drainage of Ohio. Bull. Sci. Lab. Denison Univ., 8: 

 2, 47-50, i! 



