230 MR. ROBERT GURNEY ON THE TIDES OF 
the one below and the other above the mouth of the Ant, 
at a distanee of about 130 yards from each other. Un- 
fortunately only a single complete tide was recorded, but, 
if that single observation is to be believed, there was a differ- 
ence of range of 1.4 in. and of time of 30 minutes. In other 
words the propagation of the tidal wave up the Ant appears 
.to cause a loss of range of 1.4 in. and delays its passage up 
the Bure by 30 minutes. The evidence is, however, not 
sufficient to justify such an assertion, but it raises a point 
worth further study. That the tidal wave is notably affected 
by entering subsidiary channels and by obstructions is shown 
also by observations carried out in the same way as I have 
described at Ranworth Cut. 
Ranworth Cut. 
Here again a pair of tide gauges showed a difference of 
.2 in. in range and of 15 minutes in time between points 
just above and below the Cut. The total range here in the 
Bure is about 3J inches. A little further up the river, at 
Horning Ferry, three tides recorded on July 5th — 6th, 1906, 
showed a range of 3.8, in which is probably the extreme range 
at this point. 
Ranworth Broad. 
About a mile above Ant Mouth a narrow channel about 
half a mile long leads from the river into Malthouse Broad. 
Ranworth Broad itself is reached by certain narrow openings 
from Malthouse Broad. Through the kindness of Mr. J. 
Cator I was able to set up a tide gauge in Ranworth Broad 
on August 26th, 1908, and a continuous tidal record was 
kept until September 26th. From the charts so taken 
a fairly accurate idea of the tide in the Broad can be formed. 
Taking an average over the whole period the range of tide 
was found to be nearly 3 inches, but separating the period 
into weeks corresponding to neap and spring tides the range 
was : — Springs, 3.25 in. Neaps, 2.58 in. 
