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Young's Demonstrative Translation of Scientific Secrets · Chapter 176428. Chemical Soap
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This is for washing cloths with one-half the labour of that with common bar soap. Take 16 lbs. English bar white soap, 3-1/2 lbs. sal-soda, 1 lb. pulverized rosin, 8 oz. salt; put these into 5 gallons soft water over a fire until dissolved; then put the same into a barrel, and fill it with cold water, after which add 2 oz. spirits of turpentine, and stir while cooling.