BIGELOW: COAST WATER EXPLORATION OF 1913. 



173 



side of the eastern basin (Station 10092) the upper layers were colder, 

 but the minimum was warmer (42.2° at forty fathoms), with about 43° 

 at 100 fathoms, below which it was practically uniform to the bottom 

 (130 fathoms). At the eastern side of the eastern basin (Station 

 10093) the minimum (41.1° at fifty fathoms) was about the same as in 

 the western basin, though the upper layers, and the bottom water 

 (41.6° at 115 fathoms) were both colder than the latter. 



All these temperature curves are characterized by a sudden change 



Fig. 18. — Temperature sections in the Gulf of Maine near Piatt's Bank 

 (Station 10089) and north of Cape Ann (Stations 10102, 10103, 10104, 

 10105). 



in direction at about the 30-40 fathom level, corresponding to the point 

 at which the fall of temperature ceases to be rapid. And in 1912 

 this was true of the trough west of Jeffrey's Ledge. But in 1913 

 the temperature sections at the two Stations in the latter (Stations 

 10104 and 10105, Fig. 18) show a steadily decreasing rate of cooling 

 from the surface downward. x\nd this is true in general of the Sta- 

 tions off the coast of Maine (Stations 10098, 10099, 10101, 10102, Fig. 

 19, and 10103) and of the northern end of the eastern basin (Stations 

 10097, 10100, Fig. 20). The water next the coast was, progressively, 



