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Carrier, Willis Haviland (26 November 1876–07 October 1950), inventor, was born in Angola, New York, the son of Duane Williams Carrier, a dairy and fruit farmer, and Elizabeth Haviland, a schoolteacher. From an early age, Carrier showed an interest and ability in mechanics. Graduating in 1893 from Buffalo’s Central High School, he was eager to pursue an engineering course at Cornell University, but the onset of a nationwide depression forced him to spend almost four years teaching at a local school....

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Sellers, William (19 Sept. 1824–24 Dec. 1905), mechanical engineer and manufacturer, was born in Upper Darby outside Philadelphia, Pennsylvania, the eldest son of Quakers John Sellers, a miller, farmer, and abolitionist, and Elizabeth Poole. At age six William went to live on weekdays at his grandfather John Sellers’s farm in Upper Darby, attending the nearby school his grandfather and his Quaker neighbors had founded, and learning to work on his farm and mill. At age fourteen he apprenticed to his uncle John Morton Poole, making textile machinery in Delaware. At age twenty-one he went to work for his brother-in-law Edward Bancroft in Providence, Rhode Island, making mill equipment and steam engines....