570 
BULLETIN OF THE BUREAU OF FISHERIES 
69901 > 
* 
99901 
evidence of a static 
condition in the bot- 
tom water rather than 
one of active circula- 
tion, marks the precise 
date when this profile 
was run as falling be- 
tween two of the 
pulses by which this 
indraft is believed to 
progress (p. 558), not 
as coinciding with one 
of them. Whether 
such a pulse annually 
succeeds the slacken- 
ing of the Nova Sco- 
tian current remains 
to be learned, but this 
is not unlikely. 
In 1920 the 
general increase in 
temperature that in- 
volves the gulf proper 
and the western part 
of its offshore rim from 
April to May, did not 
extend to the seaward 
slope of the latter. 
There, on the contrary, 
a change of the reverse 
order took place from 
about the 40-meter 
level right down to 
the bottom in 150 to 
200 meters (fig. 38), 
illustrated by a de- 
crease in the bottom 
temperature from 
11.5° on February 22 
(station 20045, 150 
meters) to 8.28° on 
May 17 (station 
20129, 160 meters). 
Accompanied, as it 
was, by a correspond- 
