As soon as we arrived at the foot of plane No. 1, the horses were unhitched and the cars were fastened to the rope, which passes up the middle of one track and down the middle of the other. The stationary steam engine at the head of the plane was started, and the cars moved majestically up the steep and long acclivity in the space of four minutes; the length of the plane being sixteen hundred and eight feet, its perpendicular height, one hundred and fifty, and its angle of inclination 5° 42′ 38″. The cars were now attached to horses and drawn through a magnificent tunnel nine hundred feet long, having two tracks through it, and being cut through solid rock nearly the whole distance. Now the train of cars were attached to a steam tug to pass a level of fourteen miles in length. This _lengthy_ level is one of the most interesting portions of the Portage Rail Road, from the beauty of its location and the ingenuity of its construction. It ascends almost imperceptibly through its whole course, overcoming a perpendicular height of one hundred and ninety feet, and passes through some of the wildest scenery in the state; the axe, the chisel and the spade having cut its way through forest, rock and mountain. The valley of the little Conemaugh river is passed on a viaduct of the most beautiful construction. It is of one arch, a perfect semi-circle with a diameter of _eighty feet_, built of cut stone, and its entire height from the foundation is seventy-eight feet six inches. When viewed from the bottom of the valley, it seems to span the heavens, and you might suppose a rainbow had been turned to stone.