390 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
was occupied in 20 fathoms of water some three miles off Gloucester. 
The surface temperature had now dropped to 40.5° and at 19 fathoms 
to 41.7°, 2. e., we found the reversal of temperature foreshadowed on 
the last visit, which was to be a constant phenomenon from this time 
on until spring. The salinity at 19 fathoms proved to be practically 
the same as at the last station (82.8% ,); but at the surface it had 
fallen to 32.56%, no doubt as the result of a snow-fall of three inches 
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, off Cape Ann and Gloucester, 
November 20 to April 13; and surface salinity......., off Cape Ann, 
November 20 to April 3. 
Fic. 3.— Surface Temperature 
on the previous day. Owing to the comparatively fresh surface, the 
water was now temporarily in stable equilibrium, in spite of the fact 
that it was coldest at the surface, the density being 25.77 at the 
surface, 25.98 at 19 fathoms. After completing the station we ran 
through Squam River to Ipswich Bay, where, sheltered from the 
wind, we made a station for the sake of comparison with the waters 
on the south side of Cape Ann. The surface water proved to be 
considerably colder here, 40.3°, with 40.7° at 8 fathoms. But at 18 
