226 MR. ROEERT GURNEY ON THE TIDES OF 
but it is subject to great variation. At Southtown Bridge, 
below the confluence of the Bure and Breydon Water, but 
about 2f- miles from the Haven Mouth, records of the rise 
of the tide have been taken for many years, and here the range 
is, on an average, about a foot less than on the Bar. In 
Fig. 4 I have attempted to compare the range at the two 
Fjg. 4. — Chart showing Range of Tide at the Bar (A — B) and Southtown (C — D) 
for eight months, taking comparable Tides in each case. 
places in a manner which is adequate though rough. As the 
day tides only are taken at the Bridge the range has had 
to be taken either from low water to high water or from high 
water to low water as the figures allow. The figures given 
represent the average for eight months according to the age 
