JUN 11 1918 



Bulletin 



OF THE 



Illinois State Laboratory 



OF 



Natural History 



Urbana, Illinois, U. S. A. 



STEPHEN A. FORBES, Ph.D., L,. L. D., 

 Director 



Vol. XI. March, 1917 Article VI. 



AN EXPERIMENTAL STUDY OF THE EFFECTS OF 



GAS WASTE UPON FISHES, WITH ESPECIAL 



REFERENCE TO STREAM POLLUTION 



BY 



Victor E. Shklford, Ph. D. 



