39G 
Report on the Exhibition of Lnplcnicnts 
and tile machines have been very creditable. Clayton's screens, 
perforated with circular holes, are well calculated to screen clay 
containing flat slaty stones, which inijrht pass through the screens 
composed of parallel bars. His machine is the best for making 
pipes of large diameter, because, being delivered vertical Iv, they 
descend at once upon the horse ; while those made by horizontai 
machines are apt to fall in and become flattened before they caa 
be supported. 
" Scragg has introduced an improved screen through which the 
clay is forced out on two sides, the bottom, and front of the hnx ; 
it appears to act well, 
" The judges also commend Messrs. Franklin's machine, worked 
by one horse, for pugging, screening, and moulding at the same 
time." 
No class of agricultural implements has been so rapidly im- 
proved of late, as the drain-tile and pipe-making machines. Only 
five years have elapsed since the Society's meeting at Derby, 
at which there were but two exhibited, and they excited so 
little attention, that the bare enumeration of them in the Imple- 
ment Report of that year was thought sufficient ; whilst at York 
34 were shown, and it may safely be stated that no description 
of implement in the yard, with the exception perhaps of the 
steam-engines, received more patient attention or more ample 
trial. The writer is therefore glad to have this opportunity of 
expressing liis perfect concurrence in the decision of the judges, 
and adding a few confirmatory remarks. Whitehead's prize 
machine is undoubtedly the most complete that has yet been 
exhibited ; but whilst awarding it the praise it so well deserves, 
it is but just to remark that this maker commenced the business 
at a time when most of the practical difficulties of the manufacture 
had been surmounted by the ingenuity and perseverance of 
others, and that the excellencies of his machine are chiefly the 
result of principles of construction, previously in use, the merits 
of which have in this instance become more apparent, in conse- 
quence of flrst-rate workmanship and some additional improve- 
ments. 
Amongst those who have contributed largely towards bringing 
the process of tile-making to its present position, the names of 
Clayton and Scragg deserve especial mention. The former was 
the first to introduce the practice of screening clay by the same 
machine which moulds the tile, and his perforated metallic plates 
are still in high repute for this purpose, being more universally 
effective, though not so rapid in their performance as the screens 
made of parallel wires or bars. This maker has also shown 
great talent in reducing to a system the various processes connected 
with the preparation of the clay and treatment of the tiles in the 
