and Miscellaneous Implements at Hull. 
631 
be exposed to an amount of risk that no economy in the cost of 
labour could justify. 
The points of merit recoided in Table I. were awarded for 
the performance of each machine in the first three trials with 
hay, straw, and sheaf-corn. On summing up the totals we found 
three machines had obtained more than 600 marks out of a 
possible total of 750. 
4841. Task er and Sons obtained .. .. 715 points. 
5588. Wallis and Steevens „ .. .. 695 „ 
1234. James Coultas „ .. .. 625 „ 
These three machines Avere, therefore, chosen for the final 
competition for the prize. It was already obvious that none of 
the other machines could be successful ; but as all three machines 
were provided with independent horse-works, it was thought 
best to submit to the mechanical tests two of the self-contained 
machines that exhibited the best arrangement of horse-works 
below the trough ; and for this purpose we selected 
4391. Holmes and Sons with .. .. 575 points 
165. Barford and Perkins „ .. .. 495 „ 
Each of the five machines thus selected was then set to 
deliver a weighed quantity of 20 cwt. of wheatsheaves, each 
sheaf weighing about 11 lbs., over the rick-cloth, fixed 20 feet 
high ; and the results of this run are recorded in columns 3 to 12 
of Table II. It may be noticed that the circumference given 
here in column 5 is much less than that given in column 15 of 
Table I. ; in Table I. the circumference is given of the circle 
described by the point of attachment on the shaft of the horse- 
works ; in Table II. the middle of the horse-track is taken. 
Column 6 records the average draught indicated on a spring 
dynamometer interposed between the whippletree and the shaft 
of the horse-works. The work done by the horse is of course 
made up of the direct pull exerted by him multiplied by the dis- 
tance through which he moves during the experiment ; hence the 
foot-pounds of work recorded in column 7 are obtained by re- 
ducing the hundredweights in column 6 into pounds, and then 
multiplying by the circumference of the circle in column 5, and 
the number of circles described in column 4. Many makers of 
elevators state that their machines can be easily worked by a pony; 
it is quite clear, however, from column 7, that none of the 
machines in this trial could have been driven at the speed adopted 
by the exhibitors by any horse below the average in strength. 
The one that was employed throughout the trials was a quick 
stepping, powerful mare, that worked very willingly ; but with 
most of the machines the work was done as a spurt for three 
