6W. 



Date 

 Machine, 

 Tunut — Co?*. ♦ 

 m^d nr trnd / ^ 



jjfjUoiib » ^ » 



JV>ir of Th^i'Jtiomcici* 

 CurrecUtd temperature 



Air //n^ StLrfaoe Drift, 



Trii wl or dredge or tanj^lat 



~ ~ DREDQE ROPE, 



SOUNDING WIRE. 



TUKNH, 



4«w 

 5W> 



OOrj 

 700 

 800 



I I Ot J 

 1200 

 I |C30 



1500 

 IftOO 



1700 

 iHoo 

 19CX) 



flOOO 

 2200 



^400 



