186
SOME ESSEX WATER ANALYSES.
It is difficult to say how much salt is enough to make drinking-
water injurious. There is no more salt in a gallon of this water than
a person would commonly take at dinner.
In grains per gallon :
(48, N.W.) Mistley.—On the property of Mr. R. Ince.
Deep well into Chalk. See Essex Naturalist, vol. vi., p. 54.
Communicated by Messrs. Free, Rodwell & Co., 1891.
By Mr. F. Sutton. In grains per gallon.
The water is in almost all respects satisfactory. The organic
impurity is very low. The free ammonia, though rather high, is of
no practical consequence, and is common to all deep springs. The
only weak point is the salt represented by the chlorine.
(1, S.E.) Mucking.—Waterworks at Muckingford.
Well into Chalk. See "The Geology of London," etc., vol. ii.,
p. 28. By Messrs. Corbyn, Stacey & Co.
Without perceptible colour, taste, or odour. Perfectly bright and
clear, and nearly free from suspended matter. Reaction faintly
alkaline.