46 



BULLETIN OF THE BUREAU OF FISHERIES. 



It is likewise plain that the temperatures decline noticeably as we pass toward the 

 open ocean, the maximum temperature being found at the head of Buzzards Bay, the 

 minimum at the mouth of Vineyard Sound. There was, however, at the time of the 

 June observations, no abrupt fall of temperature beyond Robinsons Hole. 



Annual temperature cyde.— Before discussing the probable significance of these 

 observations upon the waters of Vineyard Sound and Buzzards Bay, mention must be 

 made of the annual temperature cycle at Woods Hole. 



T.\BLE 9. — Air Temperature at Noon: Woods Hole Station. 



Years. 



1902. 

 1903. 

 1904. 

 1905- 

 1906. 



Five years 



January*. 



February. 



Max. Min. Mean. Max. Min. Mean 



30-3 



33. S 



26.3 

 29. 1 

 3-.0 



3 J. 03 



30.7 

 34-6 

 26.6 

 27.0 

 33-2 



30.39 



March. 



Max. Min. Mean 



42.7 

 44.9 

 37-1 

 37-9 

 35-3 



39-58 



April. 



Max. Min. Mean. 



6S 



36 



49.4 

 50- 3 

 4S-4 

 47.7 

 48.9 



48.33 



Years. 



1902. 

 1903. 

 1904. 

 1905. 

 1906. 



Five years . 



September. 



October. 



Max. Min. Mean. Max. Min. Mean. 



73 



78 

 74 

 71 

 75- S 



>8 



48 



67.9 

 67.6 

 6s- 8 

 66.1 

 67.7 



67.01 



6S 

 68 

 69 

 69 



70 



57-7 

 57-8 

 54-9 



57-7 

 58-9 



57-39 



November. 



Max. Min. Mean. 



50 7 

 43-6 

 42.1 



44-9 

 4S-I 



45-29 



December. 



Max. Min. Mean, 



33-6 

 32.5 

 30- 7 



39- o 

 '3-4 



33-82 



