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IV. On an ebbing and flowing stream discovered by boring in the 
harbour of Bridlington. By John Storer, M. D. Communi- 
cated by the Right Hon. Sir Joseph Banks, Bart. K. B. P. R. S. 
Read January 19, 1815. 
qn 
1 he following account of certain peculiarities attending a 
spring of fresh water, which was tapped in boring within the 
harbour of Bridlington quay, Yorkshire, is given from re- 
peated observations made during a residence of some weeks 
there, in the months of July and August, 1814. The harbour 
of Bridlington quay is dry at low water, except for a rivulet 
which traverses its bed : at high water, it has from fifteen to 
seventeen feet of water. 
Mr. Rennie, civil engineer, was consulted in the year 1811, 
respecting certain improvements projected in that harbour. 
At his desire, with a view to ascertain the depth of the stra- 
tum of clay in the harbour, the boring, which terminated in 
forming the well to be described, was begun under the direc- 
tion of Mr. Milne, collector of the customs for the port. The 
spot fixed upon is opposite to the termination of a street lead- 
ing to the harbour, and has about six feet of water, at high 
water, in ordinary tides. 
After the workmen had bored through twenty-eight feet of 
very solid clay, and afterwards through fifteen feet of a creta- 
ceous flinty gravel, of a very concrete texture, the auger was 
perceived to strike against the solid rock ; but as they were not 
