762 
BULLETIN OF THE BUREAU OF FISHERIES 
Although no considerable shift of this particular isohaline is indicated off Massachu- 
setts Bay by the data for 1925 ( Fish Hawk cruise 14), the 40-meter level was more 
nearly uniform in salinity there that June (32.6 to 33.4 per mille) than it had been 
the month before. 
At greater depths in the gulf (as illustrated by the 100-meter level), which are 
but slightly affected by the spring freshets from the rivers or by the Nova Scotian cur- 
rent, the mean salinity increased by about 0.2 per mille in the eastern side of the 
basin from May (fig. 127) to June (fig. 134) in 1915, but continued almost constant 
in the western side. Mavor (1923) has also recorded an increase in the salinity of 
the deep water of the Bay of Fundy during this same period, from 32.5 per mille 
at 100 meters on May 4, 1917, to 32.7 per mille on June 15. A change of the 
Fig. 134.— Salinity at a depth of 100 meters, last half of June, 1915 
same sort was registered in the bottom of the open basin, as illustrated by the 
following tables: 
Salinities ( per mille) at 175 meters 
Date 
Northeast- 
ern corner 
Eastemside 
Southeast- 
ern part 
Eastern 
Channel 
Western 
basin 
Center 
33. 78 
34. 04 
34. 20 
34. 53 
33.82 
33. 08 
April, 1920 
34. 02 
34.30 
34. 56 
34.60 
33. 84 
34. 18 
May, 1915 
33. 40 
33. 46 
33. 37 
33. 45 
33. 60 
33.64 
34. 00 
34.80 
33. 55 
33.50 
