592 Brporf of the Trial of Ploughs, Ilarnncs, Sfc, at Hull. 
The diflerences of construction are well shown in the accompanying section 
of the discs, with a side elevation of the two. 
Fig. 94. — Side Eleration and Section of tlte Discs of the Clod-crushers 
exliihited hi/ the BcverJej/ Iron and Watjijon Co)iipany, No. 1388, and. 
1)1/ Messrs. Crosskill and Sons, No. 436. 
Cl'.OSKILL. 
Bevekley Co. 
Messss. Barfurd and Perkins were highly commended for their Improved 
Press- Wheel Cambridge Clod-crusher. This is a powerful roller, 2G inches 
diameter, and covering 62 feet. It is similar to Cambridge's original pattern, 
having fluted discs, and it makes excellent work when the lumps are tractable ; 
but, when the land i;; really hard and strong, such implements rather press 
the obstructions into the soil than break them. Hence the prizes were given to 
clod-crushers with serrated teeth. The frame in this case deserves notice, as 
it is made of solid wrought iron, and is fitted with a steerage rod, driver's seat, 
and Stanley's patent self-acting scrapers. The price complete was 201. 10s. 
Class 26. — For the best Holler or Clod-crusher not 
qualified to compete ix the preceding classes. 
Although the names of four Exhibitors appeared in the list, 
only two came to trial, viz. Messrs. Brigham and Company with 
articles Nos. 1865 and 1866, and J. B. and J. Sainty with No. 
1994 ; and as both are novelties, we may briefly describe their 
peculiarities. 
3Iessrs. Brifjhtrn and Co.''s Koller (No. 1865) is a Drill EoUer ; tliat is, a 
roller specially designed to reduce clods in drills. It consists of two parts, 
each consisting of eleven sections, these sections being partly serrated and 
partly fluted ; the external discs are fluted, and the sections are much 
smaller towards the centre to suit the form of the drill. Fig. 95 will convey 
, some idea of the form of the discs, 
Fig. 95. — Messrs. Brigliam and Co. s 
Drill Boiler, No. 18G5. 
but it represents the second form 
shown, as the serrated edges, which 
distinguish the prize implement, 
are not visible. A careful trial of 
the two proved the greater efficacy 
of the serrated discs, which might 
have been expected, as it confirmed 
the experience in tlie class of clod- 
crushers. The inventors state that 
these rollers have proved most effective upon bean, ]iotato, and turnip drill?. 
The same result is, however, obtained by the rise of concave harrows, and 
