AfisceU'ineous Implements ]^d'hiJnted at Doneaster, 1912. 20?) 



stroke type without any valves in the cylinder, the piston 

 forming its own valve by uncovering exhausts and inlet ports, 

 the incoming scavenging charge of air having been compressed 

 in the crank chamber. The oil injection pump is worked by 

 an eccentric with a variable throw controlled by a shaft governor. 



FIG. 



-Crude Oil Engine. 



As regards tractors for ploughs and purely agricultural use, 

 as apart from light road tractors, it would appear as if the 

 evolution of this machine is not yet sufficiently advanced to be 

 able to say the type and form the tractor will eventually take. 

 It is possible that when it is more standardised the Society may 

 see their way to have competitive trials. 



In the Ideal Agricultural Motor, Stand 311, there is fitted 

 an arrangement whereby either driving wheel may be locked 

 while the opposite one revolves, thus turning the machine on 

 its own axis, which should be useful in ploughing. Both 

 wheels can also be locked so as to revolve together when they 

 tend to slip. The spuds on the wheels extend through the rim 

 to the hub where their ends work against a roller path which 

 can be raised or lowered from the footplate, thus forcing them 

 into the ground when required. 



