3

Iiis approximation to the curve of the bridge is thecurve itself. About the same time was introducedthe arcuation adopted at King’s college chapel , Cam-bridge, and Henry the Seventh’s chapel, West-minster, of the same character; in the vaulting ofwhich buildings architecture has obtained from geo-metry the last favour.

ON THE EFFECTS OF INCREASING THE WATER-WAY OFRONDON BRIDGE.

By a table of the levels of tides taken for a periodof four weeks, it is manifest that if London bridge beremoved, and what is called a proper water-way begiven, that the ordinary high water of spring tideswill sometimes be thirteen inches # higher above Lon­ don bridge than at present; and, by the report of1814, that it will be twenty-four inches higher; andit is probable that the extraordinary high tides may,in that case, rise three or four feet higher than thepresent extraordinary high tides. The Crown hasconsiderable property in the low lands t; and that ofindividuals is to a great amount. Perhaps it may bethought prudent to determine the levels of the wharfs,river walls, and banks, and of the low lands west-ward of London bridge, on both sides the river, inrespect to high tides, as far as the tide runs or mayrun in the case of the removal of the obstruction'

* See Rep. House of Com. 1821. But by other levels sincetaken, it will sometimes be 25£ inches instead of 18, and the aver-age will be 12 instead of 8 inches; which confirms the report of1814.

f The flood of the 28th Dec. ult. may be hereafter an ordinaryoccurrence.