Mr. W. Whitaker on some Surrey Wells. 43 
Thickness Depth 
FT. IN. FT. IN. 
Coloured [mottled] clay ...... 3 0 309 O 
Mottled clays  .......ssseecseees 47 0 356 O 
Mottled sandy clay ............ 5 0 361 O 
Bree ee 2 Bande clay. <s.c.0iseee 0 9 361 9 
Mottled clay ...........ceceeeeeee 5 9 3867 6 
[BEDI LEStar.s ceosacacse esas sscecnapens 1 0 368 6 
Dark green sand and pebbles 3 6 372 0 
Green sand  2....0....ccecenseces 8 0 380 0 
Thanet Sand, (Grey SEIS) Ap edoenareprniceneer cotter 4 0 384 O 
nearly Fine grey sand ............s00008 13 9 3897 9 
27% feet. | [Coarse prey Sand ..........0.00 1 4 399 3 
SBMlinv istics ceesecssncs sop scceceteecnes 0.2 399 5 
lig otanee ae cece seecpases das oveleiseddescSeucevoraes 90 2 489 7 
Mitcham. Gas Works. 
Boring made and communicated by Messrs. Ister. 
Lined with 240 feet of tubes,-84 inches in diameter, from 
5 feet down. 
Water-level in bore-hole 20 feet down. Yield 3500 gallons 
an hour. : 
Thickness Depth 
Well (the rest bored), believed to be about 
20 feet of sand and gravel over blue 
Monon PGlaiyancd xs asaeccpacsensascessasocs sss — 136 
Be Bilge Pond or |elaivicsss cc.cceswareccssse'-stseseecsee 342 1703 
Blue and mottled clay ......... 64 177 
pre trie Wiattlod. Clay its scadcorssconcccess 214 1984 
Dead green sand and pebbles 103 209 
Green [Thanet] Sand .............s:seeesesseesereeees 303 2393 
[Upper Chall, [Gnetk once = 80F 808 
#98% feet] (Mlints and chalk ...........-. 50 358 
A short note of two wells here by Mr. J. Lucas, in ‘The 
Geology of London,’ vol. ii. p. 209, gives the height of the 
ground as 68 feet. 
Mitcham. Brewery. Messrs. Thunder d Little. 
Made and communicated by Messrs. Isuer. 
Lined with 30 feet of tubes, 73 inches in diameter, and with 
180 feet, 5 inches in diameter, both from 6 feet down. 
Supply 2000 gallons an hour. 
