441 



fr 



THE BATHYKYMOGRAPH, A 

 DEPTH-TIME RECORDER 



SPECIAL SCIENTIFK REPOKT-FISHERIES Na 441 



lifiarine Biological Laboratory 



MAR 1 3 19h3 

 WOODS HOLE, MASS. 



1 



UNITED STATES DEPARTMEN[r^^T^^ 



FISH AND WILDLIFE SERVICE 



