Report of the Trials of Plourjhs, Hari-ows, ^-c, at Hull. 547 
the standards of the land-wheel and sliiiper are attached. It will be seen that 
the position of the wheel in reference to the beam can be shifted on the cross- 
bar. Fig. 26 illustrates the manner of working the lever a in order to raise the 
plough out of work. The dotted lines represent the position of the wheel and 
slipper during work. The black lines show the same lowered to raise the 
plough out of the ground and carry it round the headlands. It will be at 
once evident that the wheel and slipper being nearly opposite, and at the samg 
level, the plough i-ests upon a broad bearing, and is turned by the horses 
with great ease, no assistance being required by the attendant. 
Figs. 25 and 26. — Enlarged Plan and Elevation, showing the mechanism 
of Snoioden's Douhle-furrow Plough, No. 1180. 
Fig. 25. 
a. The lever handle. d. Position of land-side wheel during transit, 
e. Position of slipper during transit. /. Lever. g. S^vew for altering position of fdction-wheel It . 
The points of merit awarded after both the first and second 
trials are given in Table II. (facing p. 539) ; and it will be ob- 
served that those for " Economy in Power and Draught " are 
included only in the results of the second trial of the ploughs 
selected for testing with the Dynamometer, 
The extremely unfavourable condition of the land in Field 
No. 5 rendered it difficult to register the draught closely, con- 
sequently it was considered desirable to give a second trial in 
all cases where there was the least probability that better results 
could be made under circumstances more suitable in soil to the 
VOL. IX,— S. S. 2 0 
