608 Report on Miscellaneous Implement Awards at Derly. 
cut. These are often thrown back over the revolving saw, and 
if contact occurs, the wood is shattered, and the results are often 
very serious. A stopping-pin is provided, which ensures the 
shield reverting to its position after it has been raised for any 
cause by the man working the saw. When a quantity of similar 
work is on hand, the shield can be fixed in any required position 
by means of a locking catch. This, which the inventor con- 
siders a point of merit, strikes me as the only defect of the 
invention ; for by prolonging the projection D on the end of 
the cover, the guard can be made to adjust itself automatically 
to timber of any scantlings, and the saw is thus entirely guarded 
and accidents are rendered practically impossible ; whereas if 
the guard is fixed as suggested, a portion of the saw, according 
to the depth of the timber, is exposed exactly at the point 
where accidents to the workman handling the timber are most 
likely to occur. The apparatus can be applied to any make of 
circular saw. Regarding merely the amount of workmanship 
and material, the price of the apparatus, 5/. 10s., appears high ; 
yet, considering the extreme simplicity and perfect efficiency of 
the invention, its value to employers, owing to recent legisla- 
tion, cannot be over-estimated, and renders it an investment 
likely in a very short time to prove highly remunerative. 
In connection with this important question of guarding 
machinery, it is right to notice a safety cover for shielding 
emery wheels exhibited by J. D. Ashworth of Manchester. 
This was brought more prominently before the notice of the 
Judges, from their recollection of the fatal accident which 
occurred at the Liverpool meeting from the bursting of such a 
wheel. As far as could be judged from the appearance of the 
apparatus, no trial having been made, it seems likely to prove 
effective. It consists of a strong hood, formed of two cast-iron 
sides, bolted to the carriage of the wheel, and connected 
together above by wrought-iron distance-pieces, which would 
effectually prevent any portions of the wheel from flying, should 
it burst. It somewhat resembles the form of Carr's disintegrator, 
leaving only sufficient space unguarded to allow of the operator 
having the necessary access to the wheel. 
Gang or Riding Ploughs were exhibited by Messrs. J. and F. 
Howard, of Bedford, and John Cooke, of Lincoln, firms that 
have achieved a large measure of success as plough-makers. As 
much interest was felt by the public in these novelties, at 
least as regards the English trade, it was determined by the 
Stewards to have them at work, and this was accordingly carried 
out on Mr. Matthew Walwyn's farm, in a field secured by 
Messrs. Howard for the exhibition of their steam-cultivating 
machinery. The land was very dry, and not in a favourable 
