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10-minute run acetic acid air not exceeding alum Aluminum and chromium beaten benzaldehyde Bureau of Standards castor oil Centrifuge for three circulation of warm CLEANING FUR cleaning plant CLEANING Step cleaning with naphtha clear naphtha coagulate complete extraction dissolved dried dry-cleaning machine dry-cleaning method dry-cleaning process dust dyed leather eliminate the bleeding epidermal ether extraction ethyl ether exceeding 120 extracted with ethyl fat-free five minutes formaldehyde fur and leather fur garments fur-trimmed gallons of naphtha glove and evaporate greasy Hudson seal indicate the fatty leather materials LEATHER-GARMENT CLEANING liquor for five minutes and drain minutes in paraffin-naphtha Muskrat neat's-foot oil oleic acid original fatty content paraffin paraffin-naphtha liquor peck of maple-wood percentages pliability points on line preliminary raccoon Rinse in clear salt shown by complete Soak in paraffin-naphtha sodium formate soil soluble in naphtha solvent specimens stains sulphonated tanning materials Technologic Papers three minutes Tumble the material