174
SOME ESSEX WELL-SECTIONS.
158). Should these, however, be right, then Mr. Dalton is right in
saying that "the proximity of the base of the London Clay, coupled
with its being 300 feet close by. proves the correctness of the position
assigned [by him] to the Roding Valley fault (in the map in The
Essex Naturalist, vol. v., pl. iii.), a fault detected wholly by
calculation, and now fixed within 100 yards limit of error."
(1, N.W.) Laver, Little.—Envilles. 1892.
Made and communicated by Mr. G. Ingold.
Shaft ; slow spring.
(1, S.E.) Leigh. 1896.
Sunk and communicated by Mr. R. D. Batchelor.
Shaft 293 feet, the rest bored. Still in progress.
(1, N.E.) Mountnessing.—Tylhus, E. of Bacons, about a mile
northward of the Hall. 1895.
Under 300 feet above Ordnance Datum.
A boring communicated by Dr. J. C. Thresh.
One sample of the water contained 294 grains of chlorine to the
gallon, another 101.
1, N.W.) Parndon, Great.—"Kingsmoor" (Mr. Todhunter's).
Made and communicated by Messrs. A. Williams & Co.
Shaft 6 feet, the rest bored.
Water-level 50 feet down. Yield 300 gallons an hour.