PROCEEDINGS OF THE COTTESWOLD CLUB 99 



be obtained anvwhere on the Churn, either above or 

 below Cirencester, or on the Coin above Lechlade, owing 

 to their geological construction. 



It was the opinion of Mr Bravender, of Cirencester, that 

 a reservoir could be constructed at the mouth of the Coin, 

 into which could be conducted at once the pure spring 

 waters of the river, and doubtless the waters of the Churn 

 and the Ampneys could also be readily conveyed to any 

 reservoir so placed. 



Mr Bravender also stated his opinion as to the construc- 

 tion of a large reservoir at or near the confluence of the 

 Windrush with the Thames at Newbridge, or Langley 

 Weir, near Appleton, nearly opposite to where the 

 Windrush joins the Thames. 



Referring to the question of reservoirs being constructed 

 in the Oxford Clay by excavation in the Lechlade and 

 other areas, it was proposed by Messrs Hunter and Fraser 

 in their report to the Royal Commissioners, to construct 

 as many as nine large storage reservoirs at Stames, 

 through excavation in gravels 20 feet thick restmg above 

 the London Clav, and excavating into the London Clay to 

 the depth of 20 feet, the impervious condition of the 

 London Clay being even more tenacious than that of the 

 Oxford Clay above-mentioned in the Lechlade area, and 

 the conditions much the same. Their scheme is highly 

 important, and commands careful consideration. 



DESCRIPTION OF TABLES 



The accompanving table. No. I, exhibits the strati- 

 graphical arrangement of the Jurassic and Cretaceous 

 Rocks occupving the Upper Basin of the Thames above 

 Bensington Weir (or Wallingford), and embraces the 

 drainage of 23 areas, or 18 tributaries to the Thames. 



G2 



