Foreword 



The studies included in this report were conducted 

 at the Corvailis Laboratory, Western Fish-Cultural 

 Investigations, UoSo Fish and Wildlife Servicso The 

 laboratory facilities, equipment,, and supplies contributed 

 for these studies by the Section of Sanitary Engineeringj 

 School of Engineerinp; and Industrial Arts,, and bjr the 

 Department of Fish and Game Manafr;ement «.% Oregon Stats 

 College are gratefully acknowledged.. The inx'alu&bls data, 

 advice, and interest contributed to the study by Profs o 

 R« E. Dimick and Fred Merryfield were particulary helpful. 



Messrs o Robert Vencill, John DeWitt_„ and Ro Ao Wagner 

 assisted in these studies. 



