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Hall, Charles Martin (06 December 1863–27 December 1914), inventor and industrialist, was born in Thompson, Ohio, the son of Heman Bassett Hall, Congregational minister and Caribbean missionary, and Sophronia Brooks. His educated, pious parents of modest means moved the family to Oberlin, Ohio, when Hall was ten so that the seven children might attend the college of their parents. As a youth, Hall read widely in the libraries of his father and of the college. He also became an accomplished pianist. A true son of the age of invention, for which the ...

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Hunt, Alfred Ephraim (31 March 1855–26 April 1899), metallurgist, inventor, and businessman, was born in East Douglass, Massachusetts, the son of Leander Batchelor Hunt, an iron manufacturer and inventor, and Mary Hannah Hanchett Hunt, a leader in the temperance movement. Hunt’s family moved to the Boston suburb of Hyde Park by his twelfth birthday. He filled his free moments accumulating and classifying a collection of butterflies, birds’ eggs, and postage stamps....