452 Report on the Ti ials of Implements at Cardiff. 
in this class in having only two travelling wheels of large diameter, and is 
remarkable for its lightness of draught and facility in turning. It stood in the 
ranks folded up among the other elevators for trial like a patent Hansom among 
four-wheeled cabs. 
There are two joints in the trough, and the top and Iwttom parts fold under 
the middle, and are held by the same coupling-bars and links that serve to 
keep the trough rigid when it is opened out. The trough requires no carriage- 
frame, but is balanced upon the axle of the travelling wheels ; it is raised and 
lowered by a simple arrangement of geared quadrants and pinions moved by 
a worm-spindle, the handle of which is shown in Fig. 23 in the hand of the 
attendant. The ladder-chains are driven by octagonal jiuUeys and sup- 
ported on rollers ; they are substantially made. The frame is of oak ; and the 
straw can be delivered either at right angles or in a straight line. A machine 
precisely similar was tried and highly commended in Class V. For use in con- 
junction with a threshing-machine, however, it possesses the fault of not 
being capable of delivering the straw at any angle, and has not the gi'eat strength 
and simplicity in working which the Judges think desirable in this class. 
The strength of a chain depends vipon the strength of its weakest link : in 
appending an additional link to a process already so complex as is that of 
threshing, it is of primary consequence that it shall be free from any weakness, 
for a single hitch will delay the whole operation. 
Fig. 23. — Messrs. Tasker and Sons' Elevator and Richer, No. 4998, 
"^•y open for toorlc. 
