Tke "Voyage of E.J1.S l CkaL]le:n.g'e^' , 
MEAN TEMPERATURE OF THE OCEAf! 
I SOTH ERMAL LINES 
SHOWING THE MEAN TEMPERATURE (FAH*) 
OF THE OCEAN AT 
DEPTH OF 700 FATHOMS r 
Tr act of H.M. S. Clia 
IsothermaZs above Average, shown / in Redthits 
