BIGELOW: COAST WATER EXPLORATION OF 1913. fi 
of Cashes Bank, this was the result of solar warming, not of Gulf 
Stream water, as proved by the low salinity (p. 200). The northern, 
-western, and eastern limits of this warm region can be defined with 
some accuracy from the hourly temperatures; but how far it extended 
to the south is doubtful. It is not likely, however, that it was directly 
continuous with the warm surface water south of Georges Bank, for 
the surface temperature on the latter is lowered by the violent tidal 
currents (p. 155). 
At the eastern side of the Gulf a sudden transition from the high 
temperature of the basin to cold surface water on German Bank was 
noted, the temperature dropping from 60° to 48°, the coldest surface 
reading of the cruise. Off the Nova Scotia coast the surface tempera- 
ture was 52°-53°, rising to 54°-56° abreast of the mouth of the Bay 
of Fundy. Off Mt. Desert Rock Station 10100 showed that the zone 
Fe.0 40° 41_42_ 43 44 45 46 47 48 49 50° 51 52 53 54 55 56 57 58 59 60° 61 & 62.6364 
5 ee eee oe 
: 
Fic. 16.— Temperature sections off Cape Cod in July (Station 10057) and in 
August (Stations 10085, 10086) and in Massachusetts Bay in August 
(Station 10106). 
of 54°-56° water was of considerable breadth. Near the northeast 
coast of Maine the surface temperature was 50°-52°; rising to 54°-56° 
off Mt. Desert Island. 
Temperature sections. The temperature curves off Cape Cod 
(Station 10057, Fig. 16; Station 10058, Fig. 3) and off Cape Ann 
(Station 10087, Fig. 17); near Platt’s Bank (Station 10089, Fig. 18) 
and near Cashes Ledge (Station 10090, Fig. 18) show a very rapid 
cooling from the surface down to about thirty fathoms, followed by a 
layer, reaching down to the bottom, in which the temperature was 
almost uniform. In 1912, the temperature of the uniform bottom 
water was 40.3° at all the stations off Cape Ann and Massachusetts 
| Bay; in 1913 it was 43.9° near Cashes Ledge, 41.3° near Platt’s Bank; 
40.3° in the southern part of the trough between Jeffrey’s Ledge and 
