Maehino. . — Jttel. 



Vtt.rns + i / 



^VwmEhw Z««rf j:?./^ ^jjS^ 



Jiotlom Umperature 7 ^» * ' 



a 0/ UiernnoTnefMtr V**"" ^ ^^'*- 



Corrcctiefl Uni'prTfhhiir^ 



Air /i,"' ^V/w/fiW /W«^^ ^/jC, 



SOUNDING WIRE. 



DOWN. 



1-^ 



UP. 



200 



300 



400 



900 



J cm 



>7<JO 

 1800 



•jocm 



2Jon 



DREDG E ROPE. 



noww, 



UP, 



6' 



