Report on Miscellaneous Implement Atoards at Derby. G25 
On the eccentric of the expansion slide is attached a geared 
wheel, this wheel and the eccentric being loose on the crank- 
shaft ; a second wheel of the same diameter is keyed on to the 
crank-shaft. On a movable bar in connection with the 
governor are two geared wheels, one gearing into the outer 
wheel on the crank-shaft, and imparting motion to the second 
