Tlie Trials of Cream Separators at Doncaster. 497 
crank pedestals, so that the intermediate cranks work the 
upper shoe, and the three remaining, viz. the two outer and 
the inner, work the lower shoe, the two sets of cranks being 
placed opposite each other. 
By this arrangement the shakers are practically supported in 
the vertical sense by the shoes, and therefore need not bear 
heavily (if at all) on the cranks ; and the same connection pre- 
vents the centrifugal force due to the rotation of the crank from 
throwing the shakers upwards. In addition, and in order to 
provide a stop for the end-on momentum of the shoes, each is 
connected by stiS rods (X, X) to two pairs of vertical ash springs 
(L, L) which have their lower ends firmly bolted to the rear axle 
(M). These springs have a resisting power of about 210 lb. 
When at the extreme of their play, the bending of them absorbs 
the momentum of the shoes, and the power so stored is given out 
again in the return stroke. Tlae principle is the same as that 
involved in the air-compressor of "VYillan's Single-acting High- 
speed Engine, or of the AVorthington Compound Duplex Pump. 
The arrangement in rear of the machine for the awner, second 
riddle, and screen is very simple and complete. The whole 
machine is well designed and well made, is strong, and runs very 
steadily. 
In concluding this Report, I feel it necessary to express the 
obligations the Society is under to Mr. Milnthorp and his staff 
for their very ready and willing assistance, which materially 
lightened the work of the Stewards and Engineers, not a single 
hitch having occurred throughout the trials. 
W. AxPEBSOy, 
THE TRIALS OF CREAM SEPARATORS 
AT DONCASTER. 
The trials under notice are undoubtedly the most important 
of all those with mechanical Cream Separators which, up to the 
present time, have been conducted in the United Kingdom. At 
various shows of the Eoyal Agricultural Society, the Bath and 
West of England Society, and the British Dairy Farmers' 
Association, separators have been brought into competition, and 
a prize or medal has from time to time been awarded to one or the 
other ; but, with hardly an exception, the competition has been of 
a verj- limited nature, and in most cases the competing machines 
