626 Report on Miscellaneous Implement Awards at Dei'hy. 
wheel, which latter, bj means of an intermediate wheel, drives 
the wheel attached to the eccentric on the crank-shaft. 
So long as the governor is working at a uniform speed, 
motion is imparted to the eccentric in the same direction and 
with the same speed as to the crank-shaft ; any variation in the 
governor alters the position of the two wheels carried on the 
bar in connection with the governor, and in so doing retards or 
increases the motion given to the eccentric, and thus varies the 
travel of the valve. The apparatus was shown at Derby applied 
to a portable engine. It is equally applicable to the lift valves 
usually fitted to beam and other engines of high power. Messrs. 
Foster have so used it on a large beam-engine which drives the 
machinery in their works. The inventor claims also the appli- 
cation of this arrangement to reversing gear, and for shortening 
the stroke of an hydraulic pump as the pressure increases. 
Edward Thomas and Co., of Oswestry, are the makers of 
novelties in the form of Combined Sheep-racks and Troughs, 
Fig. 27. — View of Messrs. TJiomas and Go's Combined Sheep-rach and 
Trough, No. 710. 
with revolving corrugated iron roofs, which can be readily 
opened or closed without risk of accident from the violence of 
the wind, or unfair treatment by the workmen. A sheltered 
rack with manger for corn or roots, which can be kept dry 
from most rains, and can be readily moved about the fields, is a 
valuable implement, tending towards early maturity, if the 
proper materials are used for food. At any rate, however 
valuable and suitable the materials, there will often be much of 
them wasted if the troughs are open and the food liable to be 
wetted. 
The Sheep-rack is made of the best red deal, with carefully- 
arranged bars to prevent waste, and troughs sloping to the 
centre. As will be seen by Fig. 27, it is mounted on four wheels 
and fitted with the new patent revolving roof. This is made of 
