55 
ebbing and flowing stream at Bridlington. 
able to make any impression upon it, the work was given up 
for that tide, without any appearance of water from the first. 
In an hour or two afterwards, the bore was found filled to the 
top with fresh water, of the most limpid appearance : it soon 
flowed over, and was even projected some inches above the 
summit of the bore, in a stream equal to its calibre. When it 
* was ascertained that the water was of the purest quality and 
taste, perfectly fit for washing, and every culinary purpose, the 
bore was properly secured by an elm stock, ten feet long, and 
perforated with a three inch auger, driven to its full length : 
a copper tube, well tinned on both sides, of a circumference 
to admit its being passed through the bore of elm stock, and 
thirty-two feet in length, was then forced to the bottom of 
the bore, so as to rest on the rock. The upper part being 
properly puddled round the elm stock, and the well thus 
completed, the following singular circumstances were ob- 
served, and have continued with great uniformity ever since. 
As soon as the surface of the sea water in the harbour, 
during the flowing tide, has arrived at a level of forty-nine 
or fifty inches lower than the top of the bore, the water begins 
to flow from it, in a stream equal to its calibre, the impetus 
of which is increased as the tide advances, and may be ob- 
served to be propelled with much force after the bore is 
overflowed by the tide. The discharge continues from four to 
five hours, i. e. till the tide in returning falls to the same level 
where it began to flow : at this point, it ceases completely 
till the next flood shall have regained the same level, when 
the same phenomena recur, in the same succession; and with- 
out any variation, but what arises from the different degrees 
of elevation in the tides. The rule appears to be, that the 
