pipe, the nut being set up outside the smoke arch. The T piece lias one 

 bolt and a ball joint much like Mason's. 



The valve motion is the suspended link, and at least the suspension of 

 the link is entirely original. This is the only valve which cuts off square 

 all round. We are not at liberty to tell how the centers are laid out, 

 neither are we persuaded that a perfectly equable cut off and a considrable 

 or even a moderate slip is preferable to a motion opening the exhaust 

 square at all times, varying the cut off slightly, and allowing no slip of 

 the block at points where the valve is usually cutting off, particularly when 

 such a cut off necessitates an increased amount of machinery. But a 

 perfect cut off is a highly praiseworthy, scientific, and workmanlike achieve- 

 ment, after all. 



The tumbling shaft is suspended from 14.U to 15}^ inches back of the 

 vertical center line of the rocker arm, and from 2 % to 4 inches below the 

 rocker arm pin. Were the tumbling shaft hangers dropped from the frame 

 as usual, the shaft would pass between the forward and back eccentric 

 rod, hence hangers to suspend the shaft between the two sets of eccentric 

 rods are necessary. To accomplish this, a brace is dropped from the franie, 

 and an offset at its lower end to pass under the eccentric rods, projects 

 up inside of the rods and holds the end of the shaft. All this work is securely 

 braced. 



The eccentrics have ^% and 5 inch throw, and the valve Y4 lap, and 

 )i6 lead. The radius of the link is 6 feet, i.e., the distance from center 

 of shaft, to center of rock-shaft. It is of the skeleton variety, being 2 inches 

 thick, and iji inches broad, in the narrowest places. It is suspended 

 vertically, in the center, and horizontally, from '% to % inch back of the 

 center, thus giving of course more slip on the block than with the Rogers, 

 B. K. & Co. etc. links, which are suspended % inch back of center, and 

 much more than Mason's which do not slip at all, at the ordinary running 

 point. We mention this as a fact not an objection, for we presume the 

 jury would not agree on the subject. The suspenders are 1 1 inches long. 

 Their greatest width is across the engine, not lengthwise with it, as in 

 almost, if not all other cases. This is a very sensible idea, and ought to 

 have been adopted universally long ago. There is no strain which requires 

 strength of the suspender in the direction in which the link moves. A 

 half inch rod would hold it up. The link being suspended on one side, 

 tends to careen sidewise, and hence the suspender should be strongest in 

 the direction lengthwise with its pins. This is particularly economical 

 too, because there must be a lug forged on the side of both ends of the 

 suspender to make long bearings for the pins, and in this case no lugs 

 are necessary, for the iron is already wide enough to form the bearing. 

 In these machines it is 3 inches wide. The lifting arm is i 7 inches long, 



141 



