Miftellanea Curiofa. 5 



the Tanais, and the Nile ; all the reft being of no 

 great Note, and their Quantity of Water incon- 

 siderable: Thefe nine Rivers, we will fuppofe 

 each of them to bring down ten times as much 

 Water as the River Thames '> not that any of them 

 is great in reality, but to comprehend with them 

 all the fmall Rivulets that fall into the Sea, 

 which otherwise I know not how ro allow 

 for. 



To calculate the Water of the Thames, I afc 

 fume that at Kjngflon Bridge where the Flood ne- 

 ver reaches, and the Water always runs down* 

 the breadth of the Chanel is 100 Yards, and its 

 Depth 3, it being reduced to an Equality (in 

 both which Suppofitions I am -fare 1 take with the 

 moft) hence the Profilof the Water in this Place 

 is 300 fcjuare Yards : This multitplied by 48 

 Miles ("which I allow the Water to run in 24 

 hours, at 2 Miles an hour) or 84480 Yards, 

 gives 25*344000 Cubick-yards of Water to be 

 evacuated every Day ; that is, 20300000 Tons 

 per diem ; and I doubt not, but in the excefs of 

 of my Meafures of the Chanel of the River, I 

 have made more than fufficient allowance for the 

 Waters of the Brent, the Wandel, the Lea, and 

 Darvoent^ which are all worth notice, that fall in* 

 to the Thames below Kjngflon. 



Now if each of the aforefaid 9 Rivers yield 1 o 

 times as much Water as the Thames doth, 'twill 

 follow that each of them yields but 203 Milli- 

 ons of Ton per diem^ and the whole 9, but 1 827 

 Millions of Tons in a day ; which is but 

 little more than f of what is proved to be 

 railed in vapour out of the Mediterranean in 

 12 hours time, Now what becomes of this 

 Vapour when rais'd, and how it comes to pais 



B 3 that 



