Dat/i 



MarJiinr. " ' Keel. 



J 



fitfUorn- irmperaturc 



\ 'o. of iknrm omr t^v 

 Conrctrd iemperwlurr' 

 Air SitrJfMr 

 Tratvl or drctf^a 



SOUNDING WIRE. 



iSVK, ltl«. 



t II* 



32fJn 



Dtipih ^ ^ 



Cor. — 



DREDGE ROPE 



IJUWN, ) Ul». 



