582 
BULLETIN OF THE BUKEAU OF FISHEKIES 
in the eastern side in June, just as it is in May (p. 556, fig. 27), and warmest in the 
inner part of Massachusetts Bay. 
In June the surface of the gulf is coldest over the shallows west of Nova Scotia, 
with rather a sudden transition from surface temperatures of 8° to 9° and higher in 
the eastern side of the basin to readings lower than 7° to 8° next the land. The 
comparatively warm core (8° to 9°) extending up the deep trough of the Bay of 
Fundy, outlined by the curve for 8° on this surface chart, also deserves mention, as 
does the slightly cooler zone (7° to 8°) extending westward along the coast of Maine 
across the mouth of Penobscot Bay. 
In the offshore side of the picture, Dickson’s (1901) data for the years 1896 and 
1897 locate the isotherm for 15° as following along the continental edge of Georges 
Bank, with surface water of 20° separated from the edge of the continent by a wedge 
of cooler water increasing in breadth from west to east. 
Fig. 42. — Temperature of the eastern side of the gulf at a depth of 40 meters, last half of June, 1915. The Bay of 
Fundy temperature is according to Mavor (1923); the temperatures along western Nova Scotia are from 
Dawson (1922) 
The June chart for 40 meters (fig. 42) shows a gradation in temperature across 
the gulf from west to east of the same sort as appears at the surface (fig. 39). 
The influence of the Nova Scotian current on temperature at the 40-meter level is 
graphically illustrated by an expansion of water colder than 3° from the coast off 
Shelburne, Nova Scotia, out across the western part of Browns Bank, contrasting 
with higher temperatures (5° to 6°) on German Bank and along western Nova Scotia. 
The most interesting feature of this 40-meter chart is the sudden transition 
between the cold water on Browns Bank to the much higher temperature (8.2°) in 
the Eastern Channel (a horizontal dislocation of 5° in a distance of only about 15 
