UNITED STATES DEPARTMENT OF THE INTERIOR, Stewart L. Udall, Secretary 



FISH AND WILDLIFE SERVICE, Clarence F. Pautzke, Commissioner 



Bureau of Commercial Fisheries, Donald L. McKernan, Director 



THE BATHYKYMOGRAPH, A DEPTH- 

 TIME RECORDER 



by 



Frank J. Hester, Donald C. Aasted, and Robert W. Gilkey 



United States Fish and Wildlife Service 

 Special Scientific Report — Fisheries No. 441 



Washington, D. C. 

 1963 



