NARRATIVE OF THE CRUISE. 
903 
in lat. 35° S., and long. 13° W., touching at Ascension and the Cape Yercle Islands to a 
position in lat. 35° N. and long. 31° W. The light line represents the densities reduced to 
the constant temperature 60° F. (1 5°*56 C.). The black line represents the density of the 
Pacific Ocean. 
same water at the temperature in situ. In the Pacific the figure represents the densities 
as observed in August and September 1875 on the voyage from a, position in lat. 35° N., 
long. 156° W., touching at the Sandwich Islands and Tahiti to a position in lat. 35° S., 
