BIGELOW: COAST WATER EXPLORATION OF 1913. 243 



In 1879 the water was colder in the southern part of Massachusetts 

 Bay than we found it in 1912, except on the immediate surface, as 

 illustrated by the following pair of stations some eight miles north- 

 west of Race Point : — 



and the difference can not be explained by differences in vertical 

 circulation, the mean temperature being 46.7° in 1879, 49.9° in 1912. 

 But by the end of September, 1878, the Speedwell found the tempera- 

 tures in this region very close to the Grampus records of a month 

 earlier, e. g., 58°-59° at the surface, 44°-45° at thirty fathoms. There 

 was even a greater difference between the two years in the deep water 

 east of Cape Cod, especially in the mid-depths, as illustrated by a pair 

 of stations within five miles of each other. 



The 1879 temperatures are not directly comparable with those of 

 1913, there being no pairs of stations at the same locality and date; 

 but this side of the Gulf was even warmer in 1913 than in 1912 (p. 250). 



The Fish Hawk records for August, 1882, are especially important, 

 because in that year the subsurface temperatures were very low south 

 of Cape Cod. They yielded the following results. Off Race Point, 



