542 Report of the Judges of Implements at Norunch. 
steering-rods extend to the fore-carriage, taking the place of 
chains in former arrangements. The gear is very compact, 
and obviously gets over all question of slackness of the chains. 
The firm also exhibited one of their 8-horse Road Locomotives, 
fitted with their patent spring wheels. These wheels have 
been exhibited at previous Shows, and have satisfactorily stood 
the test of time. The wheel consists of an inner and an outer 
tire. The outer, tire consists of two "P"irons riveted together 
(J |_) by means of the diagonal plates round the outside of the 
wheel ; the inner tire, of smaller diameter, consists of two iron 
rings securely riveted to either side of the end of each spoke, 
and fits loosely into the channel formed with the two "P'i'^o^s ; 
thus the inner tire is connected with the boss of the wheel 
revolving with it. To communicate motion to the outer tire 
the latter is connected by spiral springs, connected to the end 
of each spoke, and also attached to brackets on the inside of 
the outer tire. These springs act together both in compression 
and tension. 
On the wheels of the engine exhibited there were 8 spokes, 
with springs to each, Messrs. Fowler, of Leeds, have adopted 
this system of springs for their traction engine, and exhibited 
one of them thus fitted. 
Messrs. Marshall and Sons, No. 3910, Threshing-machine. — 
In order to diminish the number of working parts and bearings 
in a threshing-machine, many of which are difficult of access, 
Messrs. Marshall have made improvements in this machine, in 
which the straw shaker is driven direct from the vibrating shoes 
of the machine, these shoes being actuated by one crank under 
the drum (which is the only crank in the machine). The 
shakers are suspended by wooden springs outside the machine. 
By this arrangement it is claimed that 2 cranks and 12 
rotary bearings, with corresponding oiling places, as well as a 
driving belt, are dispensed with. 
Such a reduction in the number of moving parts should 
materially diminish the amount of power required to d^ive the 
machine. 
Messrs. J. and F. Howard, No. 3205, Arc-axle Plough. — In 
this plough, which is an entirely new invention recently intro- 
duced by this well-known Bedford firm, are combined the 
advantages of the loose fore-carriage and of those attaching 
to fixed wheels. These objects are accomplished in a simple 
and efficient manner. In the first place, by arching the axle 
carrying the two wheels, and upon which arched axle is 
mounted a sliding block or bearer piece carrying the forward 
end of the plough beam. The shifting of the block along 
the arc regulates the position of the fore-carriage for working 
