Diagram V. Heights and hours of low water of neap tides during three days in August in 
the Swillies (Menai Straits). 
560 Lloyd Williams.— Studies in the Dictyotaceae . 
c 
Note. — For Plymouth the times of the tides should be reversed so that in Diagram V low water would occur twice during daylight, and in 
Diagram VI low water would occur at midnight and midday. For October tides in the Straits if the ‘darkness’ band is extended, the advantage 
of the Spring tide low water is obliterated to a great extent. 
