Twrti^ Cor. 

 Hlhnh or leMd 



JiffHorrh tfimpifrature 

 .A'ti. of ULrrniom^ter 

 Ctirrcdod ttrnipunthtre 



Air fiirrfaon 



Trnwl Of dred^a 



Oor. 



DHft 



SOUNDli 



TUkKS. 



DREDGE ROPE. 



tlOWN. 



iii. 



DOWK. 



or. 





r 































*- . / 

































1"' 500 































800 









































1 »w 















♦ 















































lOoo 











1700 











iHoo 



















































3300 

















