and on Miscellaneous Inventions at the Birmingham Show. 251 
the management of the week's proceedings by the Stewards, Mr. 
Jabez Turner, Mr. J. Bowen Jones, Mr. John Hemsley, and 
Mr. G. H. Sanday, and by Mr. II. M. Jenkins, the Secretary. 
Here the important and laborious task of conducting the 
dynamometer experiments was entrusted to Mr. W. K. Rich, C.K. 
Each machine was first placed upon a true horizontal platform, 
and gauged to cut at lour inches from the ground, and then 
attached to the Society's draught-dynamometer, or " mechanical 
horse," which registered both the force expended in drawing 
the reaper forward and the amount of side-draught tending to 
divert the end of the pole in a direction at right angles to the 
line of advance. Running light on an ordinary farm-road, the 
machines in Class 1 had a draught ranging from 62 lbs. (one of 
Messrs. Hornsby's six-armed machines) to 82 lbs. (The Johnston 
Harvester Company's reaper). Ten machines in this Class 
were tested in a clean upstanding crop of wheat, having a good 
rather strong straw, bright and slippery, about 3i to 4 feet 
high ; six were selected. Their performance is stated in Table I., 
and exhibited in a graphic form in the Diagram (Fig. 1, 
p. 253). The speed was preserved uniform, as nearly as might 
be, at 2^ to 2| miles per hour ; and the draught per inch width 
of cut ranged from 3*2 lbs. (The Johnston Harvester Company's 
five-armed machine), which was the lightest, up to 3'46 lbs. 
(one of Messrs. Hornsby's six-armed machines). The com- 
parison is of value to a certain extent ; but it is obvious that 
such small differences in the number of pounds draught per 
inch cut cannot be accurately said to represent the relative 
amounts of power required to do the same work unless the 
cutting were equally perfect and the gathering and delivering 
of the sheaves alike in both cases. 
In Class 2 (Swathe-delivery Machines) the Beverley Iron 
and Waggon Company's three-horse reaper showed a draught of 
3*86 lbs. per inch width of cut, and Messrs. Hornsby's two- 
horse swather 4'63 lbs. per inch width of cut. The total mean 
draught of the Beverley machine, taking a cut 7 feet wide, was 
358'8 lbs., and of Messrs. Hornsby's machine, taking a 5 feet 
cut, 266*5 lbs. ; and while the draught per horse was, in the 
latter case, 133 lbs., in the Beverley three-horse machine it was 
119 lbs. per horse. Messrs. Hornsby's six-armed reaper, worked 
as a swather in this Class, had a draught of 100 lbs. per horse, 
and 3*49 lbs. per inch width of cut ; but the work done was not 
really clean swathing. It is necessary to state, in justice to the 
Beverley machine, that, owing to the difficulty of steering when 
the dynamometer was attached to the propelling shafts in the 
rear, no course appeared practicable but to charge it into the 
standing corn ; the delivery thus undoubtedly taking more 
