INVESTIGATION OF OYSTER SPAWNING, ETC., MILFORD, CONN. 



449 



tides and the least at the time of neap tides. The lowest water temperatures in 

 the harbor were found to occur at the time of high water and the highest at low 

 water, the difference sometimes being as great as 10 or 12 degrees. 



17 



16 

 25 

 24 

 23 



22 



21 

 20 



19 



18 



17 



16 



15 



' JULY 20,1926 ^^ 



/ ^^ 



-V- 



^*,— 



JULY 1, 1325 



1925 



e.KH 



1926 



KM. 



12 12 



SRM 



FiaUEE 11.— Mean daily water temperature during "full-moon tidal period" in July, 1925, and July, 1926. Copies 

 of thermograph records show the change in the daily temperature from the beginning to the end of this period 



The influence of the tide on water temperature may be summarized as follows: 



1. The vertical and horizontal movement of the water, as a result of the tide, 



increases the area of water surface that is brought into contact with the air and land. 



