942 
BULLETIN OF THE BUREAU OF FISHERIES 
The implication of a dynamic contour of this sort in the deeps of the gulf, com- 
bined with the effect of the confining slopes and with this consumption in the inner 
part, is obvious; it provides a propulsive force to pump into the gulf the slope water 
with which the offing of the Eastern Channel is kept supplied — also dynamically — 
from the source of manufacture to the eastward (p. 847). 
APRIL 
The progressive freshening of the surface, which takes place along the northern 
and western shores of the gulf with the advance of spring, results in the development 
