The Voyage of H.M.S “CRanenger” MEAN TEMPERATURE OF THE PC E AI I 
K>0 no 120 130 140 150 160 170 180 170 160 150 140 130 130 no 100 90 80 70 60 
ISOTHERMAL LINES 
SHOWING THE MEAN TEMPERATURE (FAH B ! 
OF THE OCEAN AT 
DEPTH OF 800 FATHOMS , 
100 HO 120 130 140 150 160 170 180 170 160 ISO 140 130 120 HO 100 
90 80 70 60 
A-Biiflian Dell. 
IsothemhaZs abcrve Average shown in, Reel, thzu 
Track of H.M S. Cka! 
