SOT. 



tJfth- 



Turns 



Machine. 



Keel. 



Cor. + 





, _ Mil 



/ 



Jtn+tmn temperature 



JVo. of thermometer ^ ,J ,J_ 



CtfJTcctod temperature 



Mr £f SurfaX £ 



Trawl or dredge 



Drift 



