UNITED STATES DEPARTMENT OF THE INTERIOR 

 Harold L. Ickes, Secretary 



FISH AND WILDLIFE SERVICE 

 Ira N. Gabrielson, Director 



Fishery Bulletin 40 



THE WHITEFISH FISHERY OF LAKES 



HURON AND MICHIGAN WITH SPECIAL 



REFERENCE TO THE 



DEEP-TRAP-NET FISHERY 



By John Van Oosten, Ralph Hile, and Frank W. Jobes 



From FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



Volume 50 



UNITED STATES 



GOVERNMENT PRINTING OFFICE 



WASHINGTON: 1946 



For sale by the Superintendent of Documents. U. S. Government Printing Office. Washington. D. C. - - - - Price 35 cents 



