Bulletin 



OF THE 



Illinois State Laboratory 



OF 



Natural History 



Urbana, Illinois, U. S. A. 



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



