Add half a pound of the best quick-lime dissolved in water to every
hundred gallons. Smaller proportions may be more conveniently managed,
and if allowed to stand a short time the lime will have united with
the carbonate of lime, and been deposited at the bottom of the
receptacle. Another way is to put a gallon of lye into a barrelful of
water, or two or three shovelfuls of wood-ashes, let stand over night;
it will be clear and soft.