the Philadelphia Centennial Exhibition. 
13 
stone's principle, being driven by square-linked chain-gear from the main axle 
and bevel wheels. The rake-standard is wrought iron ; the gearing very 
compact and well shielded. Fig. 7 represents a plan of the self-adjusting. 
Fig. 7. — Self-adjusting Batchet of L. D. Sawyer's Reaper. 
B. Showing incline on back of lug. 
A. Self-adjusting ratchet. 
ratchet, with the incline on the back of the lug, by which the action is 
effected. I regret that no trial of this machine was made in the field ; so far 
as could be judged from examination, it appeared likely to work well, and it 
certainly possesses sufficiently novel details to justify notice. 
The Johnston Harvester Company, of Brockport, New York, exhibited 
four different machines, all of which made good work. One of these, some- 
what out of the ordinary run, inasmuch as the crank-wheel was horizontal 
Fig. 8. — Chain-gear of Johnston Harvester Co.'s Reaping Machine. 
a. Travelling-wheel. I C. Sproggle-wheel on axle of driving-wheel. 
B. Pinion on rake-shaft. | E. Self-ligbtening lever, by roller and springs. 
instead of vertical, took a width of 6 feet. The Wrought-Iron Harvester and 
the Combined Machine, of similar construction, appear valuable machines, 
specially adapted for export. I believe that one of the former competed 
