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The Penrhyn Railway is six miles and a quarter in length, divided into five stages. It has three-eighths of an inch fall in a yard, with three inclines; was begun in October 1800, and finished in July 1801. The annexed sketch shows the kind of waggons that were used on this railway, twenty-four of which containing 24 tons, were drawn by two horses (one stage) six times a day; which is 144 tons per day, drawn 6.25 miles per day. This quantity of work was previously performed by 144 carts, and 400 horses; so that ten horses will by means of this railway do the work of four hundred!