536 Miscellaneotis Implements Exhibited at Doncaster. 
occasion. Further, the engine is yet in a somewhat early 
stage of development, and some details will no doubt be im- 
proved upon. During the trial, however, the firing of the charge 
was regular, and the combustion was complete. From its 
extreme simplicity it should prove to be a very useful engine 
for farm purposes. 
Messrs. Harrisons & Co., St. Peter's Works, Stamford, showed 
their new Central-suspended Double-action Haymaker (Art. 
2256). The novelty a7id advantages in the machine (fig. 13) are 
that the forks are carried on the main axle without any inter- 
mediate gearing, thus doing away with unnecessary parts, ensur- 
ing the working of the tines at a uniform distance from the ground 
when crossing ridge and furrow, and making it independent of the 
position of the horse, thus obviating the necessity for an adjust- 
ment to regulate the height of the tines, although means are pro- 
FiG. 13.— Central-suspended Double-action Ha3-makcr. 
vided for raising or lowering them if occasion demands it. The 
gearing consists of an internal toothed wheel mounted on a sleeve. 
The sleeve has a cross arm upon which are mounted two con- 
necting pinions which are of the proper size to gear into the 
bedding-fork pinion, and are arranged opposite to each oth'er, the 
thrust of one pinion taking up the thrust of the other pinion, 
thus carrying the tedding-fork pinion and greatly reducing the 
friction. The reversing of the action of the machine is accom- 
plished by first holding the internal wheel or revolving the 
sleeve carrying connecting pinions, and then revolving the 
internal wheel with the road wheel and holding the connecting 
pinions fixed to the frame. The clutches for doing this are 
simple, yet also form an effective ratchet to reduce the strain on 
the tedding-forks when the machine is brought to a sudden 
standstill. The construction of the machine is very simple, one 
