BIBLIOGRAPHY. 



Forbes, S. A. 1910. The Investigation of a River System in the 

 Interest of its Fisheries. 



Read before the Am. Fish. Soc, New York City, Septem- 

 ber 2&, 1 910. b 



Forbes, S. A., and Richardson, A. M. 1913. Studies on the 

 Biology of the Upper Illinois River. 



Bull. 111. State Lab. of Nat. Hist. 9:481 — 574, 20 plates. 



Marsh, M. C. 1907. The Potomac River Basin. 



Water Supply and Irrigation, Bull. 192. U. S, Geol. Surv. 



Marsh, M. C. 1916. Sewage Disposal by Fish Culture. 

 Trans. Am. Fish. Soc, 45:170-6. June, 1916. 



Shelford, V. E, 1917. An experimental study of the effects of 

 gas waste upon fishes, with especial reference to stream pol- 

 lution. 



Bull. 111. State Lab., 11:381-412. 



Turner, C. E. 1918. Plant and Animal Life in the Purification of 

 a Polluted Stream. 



Sci. Mo., 7«34~45. (July.) 



Wells, M. M. 1918, The Reactions and Resistance of Fishes to 

 Carbon Monoxide and Carbon Dioxide. 



Bull. 111. State Lab. Nat. Hist, 11:557-579. 



