town near London, where is a well that affords a purging water, which is noted for the pungency of its salt. This water is whitish; to the taste it is sweetish, with a mixture of the same bitter which is in the Epsom water. The salt of this water is not quite so soft as that of Epsom; and is more calcareous than it, having more of the salt of lime: for a quantity of the Acton water being boiled high, and mixed with a solution of sublimate in pure water, threw down a yellow sediment. The salt of the Acton water is more nitrous than that of Epsom; it strikes a deep red, or purple, with the tincture of logwood in brandy, as is usual with nitrous salts; it does not precipitate silver out of the spirit of nitre, as common salt does: 1½ lb. of this water yields 48 grains of salt.