544 
BULLETIN OF THE BUREAU OF FISHERIES 
the observations were made so soon after the coldest time of year that the temper- 
ature had not risen more than fractionally, it seems safe to say that the water did 
not cool below 1.5° to 2° in the northern half of the bay during the winters of 1921 
or 1925, except right along the land, where it is most subject to winter chilling 
instead of close to 0°, as in 1920. 
A similar relationship obtained between the years 1920 and 1921 at the mouth 
of the Bay off Gloucester (fig. 21), the following readings taken there in the first 
week of March pointing to a minimum of 1.5° to 2° for the winter of 1920 and 
about 3° for 1921. 
