Page:Treatise on Soap Making.djvu/65

49 {|
 * oz.
 * dr.
 * gr.
 * An English pint of spring water weighs about|||15||3||12
 * A strong soap-ley, the English pint, weighs about|||17||6||24
 * The difference between the two is,|||2|||3|||12
 * }
 * A strong soap-ley, the English pint, weighs about|||17||6||24
 * The difference between the two is,|||2|||3|||12
 * }
 * }

—and supposed to be the quantity of fixed alkaline salt contained in one pint of such ley. A most accurate and easy method for ascertaining the strength of soap-leys for immediate use, is as follows, viz.

Take a small bottle, and having filled it with water, put it into one scale, and as many small lead-shot into the other will exactly balance it. Suppose 12S is requisite for that purpose. Suppose, again, that the bottle and water just weighs 4 ounces; this is throwing it into 128 parts; half of that is $64⁄128$, or 2 ounces; half it again,