the steam on the large valve-stems, thereby insuring a quick cut-off, and the positive closing of the port, under all circumstances of speed and pressure.

The steam-valves are operated by toes, on the inner ends of two rock-shafts that connect with the valve-stems outside the steam-chest. The outer ends of the rock-shafts are furnished with steel-tipped toes.

There is a sliding bar carrying tappets, which receives a reciprocating rectilinear motion from an eccentric on the main shaft.

Below the sliding bar is a gauge-plate connected with the governor, which receives an up and down motion from a reverse action of the governor balls.

The tappets in the sliding bar are attached to the gauge-plate, and elevated or depressed in the bar by the action of the governor.

As the sliding bar moves in the direction of the arrow, one of the tappets is brought in contact with the inner face of the toe on the rock lever, causing it to turn on its axis, thereby opening the steam-valve at one end of the cylinder. At the same moment the other tappet comes in contact with the outer face of the other toe, and as the surfaces are beveled, the toe is forced up into the cocket until the tappet passes under, when it drops by gravity alone into its original position, to be operated upon in

its turn, when the motion of the sliding bar is reversed.

As a result of this motion the tappets always give the valves the same lead, and as the bar moves in a straight line, while the toe describes the arc of a circle, the tappet will pass by and liberate the toe, which is brought back to its original position by a weight, and the steam pressure on the large valve-stem, which thus closes the valve and cuts off the steam. The liberation of the toes will take place sooner or later, according to the elevation of the tappets: that is, the lower the tappets are, the sooner the toes will be liberated, and vice versa. By the elevation or depression of the gauge-plate, the period of closing the valves is changed, while the period of opening them remains the same. The adjustment of the gauge-plate is effected directly by the governor.

Both the exhaust-valves and seats are convenient of access, and removable from the outside of cylinder. The valves receive their motion from a seperate eccentric, thus allowing of easy adjustment, without interference with the steamvalve mechanism. All the connections are on the outside, are few in number, and have ample bearing surfaces, insuring freedom from rapid wear and derangement.

A safety stop-motion is combined with the governor, preventing the admission of steam,

should the governor belt run off or break. The cross-head gibs are directly opposite the centre of pin, thus avoiding any cross strain upon the piston rod; a lack of attention to this point has been the cause of many serious accidents.

SHOWS THE STEAM VALVE GEAR IN PERSPECTIVE.

The steam-ports are large, thus insuring the full pressure of steam to the point of cut-off.

The engine is extremely sensitive to the action. of the governor, and is, therefore, particularly adapted to those situations where perfect regulation is required.

All parts are well proportioned, made of the

SHOWING ACTION OF STEAM-VALVE GEAR.

A A' are the two rock levers; B B' the sockets attached to them and within which the toes K K' are contained; C C' the arm of the levers attached to valve-stems; D D' the valve-stems: EE' the steam-chest; F the governor rod; GG' the tappets; L the gauge-plate; H gauge-plate guide, and the sliding bar.

The sliding bar is shown moving in the direction of the arrow, causing the tappet G' to operate upon the toe K', giving an opening movement to the valve-stem D', the tappet G mean

while passing under and lifting the toe K. The amount of opening of steam-valves is determined by the height of the tappets G G', the positions of which are always under control of the governor. The toes drop by gravity, no springs being used, thus relieving the governor of all strain while tripping.