This engine, recently patented by Mr. O. E. Morse, of Dillon, Montana, is designed to utilize the steam to the fullest advantage, and the engine is readily reo versed by simply shifting the lever to change the po :;ition of the slide valve. Fig. 1 is a view in perspec tive and Fig. 2 a side sectional view. On the driving shaft, within the cylinder, is secured the hub of a wheel containing a series of four pistons fitted to slide in the rim of the wheel, the opposite pistons being connected in

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... irs at their inner ends by a slotted frame t. hl'ough which the shaft passes, so that the pis-I tons have free radial movement, one moving inward :-l,S the ot-her moves outward, and vice versa. The outer ends of the pistons engage the inner surface of part of the cylinder and part of an abutment in the eylinder, an inverted plan view of which is shown in Fig. 3. The abutment is preferably made in two parts, bolted at their outer ends to the cylinder, and connected with each other at their inner ends by bolts and intervening packing strip, and th e abutment serves to press an outermost piston inward, so that its opposite mate �lides outward into contact with the peripheral inner surface of the cylinder. In the abut Illent are two openings into which lead four ports opening into a steam chest containing a slide valve having a single port adapted to connect with the two inner ports, the side ports connecting with compart ments from which lead the exhaust pipes. The valve stem of the slide valve is pivotally connected with a lever adapted to be locked in any desired position on a segmental arm. As shown in Fig. 2, the. slide valve port admits steam through only one of the live steam ports of the cylinder, and the exhaust takes place through the exhaust port at the right, but when the engine is reversed, hy swinging the lever outward, the slide valve is shifted to close one of the live steam MORSE'S ROTARY ENGINE. ports and open the other, and the exhaust then takes place through the exhaust port at the left.