United States Department of the Interior, Fred A, Seaton, Secretary 

 Fish and Wildlife Service, Arnie J. Suomela, Commissioner 



A PHOTOELECTRIC CURRENT METER 



by 



H. C. Boyar 



Fishery Research Biologist 



Bureau of Commercial Fisheries 



Biological Laboratory 



Boothbay Harbor, Maine 



aiid 



F. E. Schueler 



30 Albermarle Road 



Waltham, Massachusetts 



'^"^^'^^ 



United States Fish and Wildlife Service 

 Special Scientific Report—Fisheries No. 330 



Washington, D. C. 

 March 1960 



