Boston Lightship (Figure 4, Table 4) 



The record at Boston Lightship, in 

 contrast to that for the previous two years, 

 is disappointing in that it is incomplete 

 because of failure to lower the bathythermo- 

 graph to the bottom. There are indications, 

 however, that the temperature regime here 

 closely parallels that observed at Portland. 

 That is, winter values were above the mean 

 while summer readings averaged below normal. 

 Though the essential record of bottom tem- 

 perature is missing almost completely, what 

 data there are hint at a cold intrusion 

 during June, at least, similar to the one 

 seen at Portland, 



The surface maximum appeared abruptly 

 early in August and was lower thjui the 

 maxima for the previous two years. The 

 autumn overturn occurred in October. From 

 mid-November to year's end temperatures 

 remained slightly above the mean. 



The pattern of salinity closely paral- 

 leled that seen at Portland, From February 

 through November readings were consistently 

 lower than those for 1957, but very similar 

 to the 1956 record except for the low sur- 

 face values which appeared in May. These 

 were lower than any seen during the two 

 previous years. 



Figure 4. Boston Lightship. 1958, (Dashed line in upper diagram, mean for 

 period 1925-1941j 



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