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Lippincott's planimeter 1896, in case 9 1/2x3 1/2'x1 1/2' Science Museum Group © The Board of Trustees of the Science Museum
Lippincott's planimeter 1896, in case 9 1/2"x3 1/2"x1 1/2", instrument inscribed "The Lippincott Planimeter manufactured by Hine and Robertson Co., N.Y. No.1252" and "Patented Oct. 6, 1896"