S'fn/t or lead /' 

 Boi torn ^» ' *- '^^y 

 JJottom' IcmpcralUft't' 

 jYo. of ThvrwMtictvr 

 Corrected 



Con — 



^ Surface 



Air 



Trttfvl or dredge or tfJrt^^Jrs 



^ /?r 



SOUNDING WIRE. 





DREDGE ROPE. 





VI'. 





tip. 







( 1 



















loo 



200 



300 











500 











Gou 











70t) 











Koo 











yoo 



















i ICK> 











120ia 











•joo 











1400 











1500 











1600 

 1700 











iHoo 































2|i» 





- 





J20O 



2300 











2400 





