Captain Sir S. Brown estimates, from experiments made by him at the
extremity of the Brighton-Chain Pier in a heavy south-west gale, that
the waves impinge on a cylindrical surface one foot high and one foot
in diameter with a force equal to eighty pounds, to which must be added
that of the wind, which in a violent storm exerts a pressure of forty
pounds. He computed the collective impetus of the waves on the lower
part of a lighthouse proposed to be built on the Wolf Rock (exposed
to the most violent storms of the Atlantic), of the surf on the upper
part, and of the wind on the whole, to be equal to 100 tons.