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George N. Comer was founder, in 1840, of a Boston "Commercial College" bearing his name. The subjects it taught were eclectic: penmanship, bookkeeping, commercial correspondence and computations, navigation, engineering, and surveying. The…

Prior to the 1800s, corn was planted by hand in hillocks or rows. Industrial technologies profoundly affected agriculture with many patent machines like this horse-drawn planter designed by Calvin Olds. In a language typical for other devices of the…