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Scarce group of three pencil sketches by Thomas Edison from circa 1886, accomplished on individual off-white sheets ranging in size from 4.25 x 7 to 7.75 x 5, with drawings including: an incandescent light bulb with turn-knob socket; a group of four metal funnels with interspersed circles; and an assortment of miscellaneous rectangular figures and converging lines. In overall very good to fine condition, with some light staining and toning. Originates from the estate of Mrs. Pierre Bernard, the granddaughter of Edison employee James Symington, who was a Port Huron neighbor of Samuel Edison.
