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100 Per cent A. L. C. A. Method accurately acetic alkaline aluminum ammonia ammonium Assoc barium bath beaker boiling bottle calcium Calculate and report Calculate percentage casein Chap chromium color containing cool crucible desiccator determination dilute directed under analysis dish dissolve distilled water drops enzyme ether evaporate exactly extract fatty acids filter paper filtrate funnel glass heat hide powder hot water hydrochloric acid ignite indicator insoluble matter iodine iron Leather Chem Leather Trades Chem let stand measured methyl orange methyl red neutral obtained oxide petrolic ether pH value phenolphthalein Pipette platinum potassium precipitate quantity relative humidity report percentage residue salt sample weighed skin soap sodium carbonate sodium chloride sodium hydroxide sodium sulfate sodium thiosulfate soluble specific gravity standard stopper sulfate sulfide sulfur trioxide sulfuric acid tannin tanning materials temperature tenth-normal sodium hydroxide titrate tube unsaponifiable unsaponifiable matter vegetable-tanned volume wash