Chester Valley; and two main lines of the Under­ ground Railroad ran through Lancaster County, close to where the two lines of the great steam railway which tra­ verses it from east to west are now located. A9quiescing in this decision Pennsylvania, in 1847, re- . pealed the provisions of the Act of 1826

directing slaves to freedom was organized with the establishment of the first underground railroad sta- tion at Columbia, Pennsylvania, in Lancaster County, on the Susquehanna River, by Samuel Wright. ? Wright's idea spread quickly and numerous stations were established in Ohio, Indiana, and Illinois. 8

An Early Threshing Machine in Lancaster By WILLIAM FREDERIC WORNER LATE in the summer of 1806, a threshing machine, invented in Scotland, was erected at David Witmer's mill in Lancaster county, Pa. The machine was capable of threshing 35 bushels of oats in an hour, of threshing and cleaning 100