Lime-Water.
P0UR two gallons of water gradually upon a pound of fresh burnt quicklime; and when the ebullition ceases, stir them well together; then suffer the whole to stand at rest, that the lime may settIe, and afterwards filter the liquor through paper, which is to be kept in vessels closely stopt.
The lime water, from calcined oyster-shells, is prepared in the same manner.
Lime-water is principally used for the gravel; in which case, from a pint to two or more of it may be drunk daily. Externally it is used for washing foul ulcers, and removing the itch, and other defecations of the skin.
William Buchan
Domestic Medicine 2nd edition 1785