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Chief Chemist Walter L. Howell analyzing sugar at the New Orleans laboratory, 1906. The flasks on the left contained sugar in solution, while the ones on the right incorporated a small amount of lead acetate to determine impurities.
Chief Chemist Walter L. Howell analyzing sugar at the New Orleans laboratory, 1906. The flasks on the left contained sugar in solution, while the ones on the right incorporated a small amount of lead acetate to determine impurities.