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Show Agricultural Inventions All the inventions which revolu-ti' revolu-ti' r.i:-:ed a gric'alt'ure originated in rth America. The reaper was in-vc-'-.led in 1831, and the mower about three years later. The threshing machine followed in 1 K."4 and the first combine in ifSG. Grain drills permitting more efficient planting than hand sowing came in the MOs. Within one decade the time required re-quired to harvest an acre of wheat was reduced from an estimated 37 hours to ll1? hours. Extension of the railroads would not have been possible without development of the West by farm machinery. |