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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…

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…