Report on the Trials of Impleinents at Taunton. 669 
tested by the Society's dynamometer, under the superintendence 
of Mr. Anderson. A summary of the results of these Trials is 
given in Table VI., facinj^ P^i^ge 670. 
The Judges considered that the price, 11. 10.?., of No. 3813, 
by J. P. Fison, to which they gave the First Prize, was higli 
for a guard ; but it was far superior to any of the others, and 
although the revolving drum may be said to assist in the 
operation of feeding, yet there was no saving in the number of 
hands. It evidently took very little power to drive it, but this 
was not tested. 
Fison's Drum-Guard, i\"o. 3813. — This appliance may be shortly described : 
A represents a revolving cylinder, having a wood frame cased with sheet- 
iron, driven by a two-inch belt from the shaker-spindle, making 100 revo- 
lutions per minute, and covering the full width of the mouth of the machine ; 
it is supported at either end by two balanced levers, c, connected with the 
swinging leed-board d, ,hung on pivots e. b shows eight bevelled wood 
projections, 1 x Is inch, screwed upon the cjdinder. 
Fig. 3S.— Section of Mr. J. P. Fison s Drum-Guard, No. 3813. 
H 
The spindle of the cylinder rests in moveable dies, in slotted iron brackets, g, 
bolted to the framework of the threshing-machine, and allows an extreme 
play up and down of 85 inches. When compressed down either by a person 
slipping upon the guard, or by an extreme weight of corn upon it, the belt 
Ijecomes slack, and the cylinder stops revolving. The same thing occurs 
when the feed-board is over-weighted ; or an untied sheaf falling upon the 
cylinder causes a jam, and it ceases to act. When removed, the cylinder 
adjusts itself by rising into position by means of the lever c, and brings the 
belt into action. 
