Stinei/ Wells and their Teachbuj-s. 65 



Southwark. — Belfast ami London Aerated Water Compawj, 

 29, Bankside. 



Made and communicated by Messrs. G. Isler & Co. 

 Shaft 12 feet ; the vest bored. 



Water-level 114i feet down. Yield (minimum) 3000 gallons 

 an hour. 



FT. IN. 



Made gi'ound 7 



[Elver Drift, (Grey sand 20 



27 ft.] t Ballast [gravel] 7 



Blue [London] Clay 75 



[Mottled clay 22 9 



Stone 1 



Sand and mud 4 6 



Mottled clay and pebbles 14 3 



Congealed ballast [pebble-conglomerate] ... 16 



Pebbles 9 



Sand and ballast [pebbles] 3 8 



-Clay and pebbles 8 9 



Green [Thanet] Sand 37 5 



Chalk and flints 97 



[Reading Beds, 

 56i ft.] 



800 2 



Streatham Common. — Southwark and Vauxhall Water Co. 

 Communicated by Mr. J. W. Eestler, Engineer to the Company. 

 110 feet above Ordnance Datum. 



Gravel, &c 10 



London Clay 153 



"Woolwich and Beading Beds ? 43 (+) 



Thanet Beds ? 85 



Chalk 623 



Upj)er Greensand 29 (— ) 



Gault (not bottomed, January, 1886) ... 147 



1040 

 I had hopod that Prof. Prestwich would give a detailed 

 account of this important work to the Geological Society ; but 

 from pressure of work he has felt obliged to give up the task, 

 and has asked me to take it up. Pending the completion of the 

 boring it is enough to note the thickness of the formations 

 passed through. 



Thames Ditton. — Lambeth Water Works. Trial-borhnj. 1879. 

 W. side of Filter-bed, and a little S. of the Thames. 



Ground-surface of Engine-yard over 35^ feet above Ordnance 

 Datum. 



Communicated by Mr. J. Taylor, Engineer to the Company. 



