640 report — 1878. 



quantity of water passing through the Straits per unit of time at any instant of the 

 twelve hours. The double high-water experienced at Southampton and in the 

 Solent and at Christchurch and Poole, and still further west, which is generally 

 attributed to the doubleness of the influence experienced from the tidal streams on 

 the two sides of the Isle of Wight, seems to have a continuity of cause with the 

 double low water at Portland, which is certainly allied to the protracted high water 

 of Havre, a phenomenon quite beyond reach of the Solent's influence. It is pro- 

 bable, therefore, that the double high water in the Solent and at Christchurch and 

 Poole is influenced sensibly by the current through the Straits of Dover ; even 

 though the common explanation, attributing them to the Isle of Wight, be in the 

 main correct. 



