SOME ESSEX WELL-SECTIONS.
177
weeks. Analysis showed that it contained 71.95 vols. of carbonic
acid in 10,000 (.7195 per cent.).
2. Mr. Silk's House.
Shaft 36 feet, the rest bored.
Water from sandy veins in the clay.
(2.) Shoeburyness.
Made and communicated by Mr. R. D. Batchelor. 1895.
Shaft 170 feet, the rest bored.
Water-level 76 feet down, lowered to 1461/4 after 48 hours test-
pumping.
Judging by the section in The Essex Naturalist, vol. vi.,
p. 57 (1892), it is possible that the River Drift should be taken
down to 62 feet, in which case the clays between that depth and
22 feet may represent the brickearth of Grays, etc., of the existence