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"Twenty-six ounces of very strong quicklime, made of chalk, were slaked, or reduced to a sort of fluid paste, with eleven pounds of boiling water, and then mixed in a glass vessel with eighteen ounces of a pure fixed alkaline salt, which had been first dissolved in 2½ libs of water. This mixture was shaken frequently for two hours, when the action of the lime upon the alkali was supposed to be over, and nothing remained but to separate them again from one another. I therefore added 12 libs. of water, stirred up the lime, and, after allowing it to settle again, poured off as much of the clear ley as possible."
Another method of the same professor is, One part of a pure fixed alkaline salt to three parts of common limestone, fresh slaked and sifted, for a common or ordinary soap-ley. He then proceeds thus:
