at the Derby Mcetiny, 1843. 
469 
Mr. Howard's, Messrs. Barrett and Co.'s, Mr. BrayLun's, Mr. 
Scurrch'sj Messrs. Sanders and Williams's, and those of other 
makers. Of the wheel-pl()U<jhs several were readily convertible 
to the swing kind, and furnished with variously formed mould- 
boards to suit the condition of different soils. 
Drill-Flouyhs. — Three ploughs, with single-row drills, were 
produced; to one of which, constructed by Mr. John Meakin, 
farmer", of Spondon, near Derby, a silver medal was awarded, it 
being, in the opinion of the Judges, the best implement of the kind 
they yet had seen. Motion is communicated to the seed-apparatus 
from the plough-wheel, and the seed is immediately covered by a 
small light harrow, or roller, according to the kind of seed sown. 
This plough executed its work neatly, and the drilling apparatus 
was readily thrown out of gear at the land's end. 
ISah-Pulverizers. — Under this or some synonymous title a va- 
riety of implements was exhibited, of greater or less merit. The 
object of by far the larger number was to effect pulverization or 
comminution of the soil below the depth of common ploughing — 
not the breaking of it up in lumps or masses. In this respect 
the makers may be said to have profited by* the example set by 
the many-tined tool of the Hon. M. W. B. Nugent, shown and 
rewarded at Bristol, which again appeared, with improvements 
for its management from the hand of Mr. Clyburn ; but the op- 
portunity did not serve for ascertaining their value, much to the 
regret of the Judges. 
Mr. Carson, of Warminster, produced a sub-pulverizer, on 
three v/heels, having a lever for raising the tines out of the ground 
at the land's end, or when meeting any formidable obstacle. 
This machine acted in a manner to elicit warm encomiums. The 
main frame is disposed in the shape of a right-angled triangle, 
the fore wheel being placed at the vertex, and the hind wheels at 
the extremities of the base. The leading and right-hand hind 
wheels are in a line, and travel in the furrow made by a plough, 
thus assisting to guide the machine, and to determine in part the 
depth to which the tines plunge ; whilst the left-hand wheel rolls 
on the land side, and serves to maintain the whole in equilibrio. 
From this arrangement of parts It is evident that fair swim- 
miny must result ; and it was found that the disposition to pitch 
and roll, common to the ordinary swing subsoil-plough — proper- 
ties which render it difficult to be handled and managed so as to 
preserve even tolerable uniformity of depth and action In many 
soils — is entirely overcome. As respects ease of guidance, this 
implement worked, under the eye of the Judges, through long 
spaces without holding, maintaining a straight path and very even 
depth in the stiff clay operated upon. At the end of a bout the 
tines were raised out of the ground and set in again without stop- 
