52 



Graphs of Mean and Extreme Temperatures 



The variation in the mean svirface water temperatures during the month and year for a number 

 of places Hsted in Table 1 is shown by the soUd lines. The dots show the maximum and TniniTrmm 

 temperatures observed each month. 



EASTPORT. ME. 

 1930-1950 



PORTLAND. ME. 

 1922-1945 



PORTSMOUTH. N.H. 

 1944-1950 



i__ • 1 1 — ^ . ^^^ — • 1 — ^""Vi 



I • ; 



• • 



- • 



•F JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEPT. OCT. NOV. DEC. 

 60 



E • • ' • \ 



• • — 



- • • 



20 



• - 



• • - 



- • 



r-» • • 



BOSTON. MASS. 

 1922-1950 



• - 

 *— — 



- • • • 



WOODS HOLE. MASS. 

 1944-1950 



80 

 70 

 60 

 50 

 40 

 30 

 20 



• • - 



I • • : 



:: 1 — y^ • — _^i.^_- • r 



- * • .y^ • *v - 



» • — 



; • • = 



