Report of the Judges of Implements at Norwich. 
541 
is so much larger than the high-pressure one, it is obvious that 
if steam of equal pressure were admitted to both cylinders, the 
larger one would do the most work, and consequently the engine 
would run unevenly. To overcome this, a steam-reducing 
Fig. 15. — Section of the Tliree-way Coch of Messrs. Foden and Sons' 
Compound Traction Engine, No. 3976. 
valve is provided in the passage to the low-pressure cylinder, 
by which means the power to each cylinder is equalised, and 
the engine works as an ordinary double-cylinder high-pressure 
engine. 
3fessrs. Aveling and Porter, No. 2, Agricultural Traction En- 
gine. — This, an 8-horse power agricultural traction engine, is 
fitted with an improved steel fore-carriage, and a new arrange- 
ment of steering-gear. The fore-carriage is made of two steel 
plates, which are flanged on a disc in a hydraulic press, so that 
thev approximately assume the form of a double-hollow cone, 
in the larger portion of which is fitted the cast-iron swivel block 
which carries the fore part of the engine ; whilst into either 
end, the axles of the wheels are securely fitted and riveted in. The 
steering-gear consists of a geared segment, carried by two steel- 
flanged brackets, fixed under the boiler on the front plate of the 
water space surrounding the fire-box. This segment is worked 
by means of a worm-wheel spindle and hand-wheel in the usual 
way from the foot-plate. From either end of the segment, 
