724 
Report on Implements at Preston. 
New Grind ino^ Mills of Wood's Patent were exhibited by 
two firms. Those of a smaller size by Messrs. Hunt and Tawell, 
and larger ones by Messrs. C. Burrell and Sons. The smallest 
size costs 2/., and is said to be especially suitable for grocers 
to grind rice, coffee, &c. ; the next size is priced 4/. 45. for 
Colonists. The larger sizes cost 11. Is., 16Z., and 24Z., re- 
spectively, and are suited for farm use. 
The grinding surfaces of these mills are two circular flat 
metal plates placed horizontally, and so grooved or fluted that 
the corn, entering at the centre, is ground before passing out at 
the edges. These plates are so dressed, that a series of main 
grooves or feeders run tangentially from the feed-tube, becoming 
gradually shallower as they approach the circumference ; a 
second series of furrows, drawn at an acute angle to these feeders, 
runs from them to the circumference. The bottom plate re- 
A'olves, and is carried on a central bearing that allows it to find 
its own level ; the upper plate is stationary. During a short 
trial we found that Messrs. C. Burrell and Sons' mill, No. 4224, 
driven by their own 8-horse power engine with 40 lbs. of 
steam, ground a bushel of barley satisfactorily in 1\ minutes, 
and kibbled a bushel of maize in 2i minutes. 
There were two exhibitors of new implements for the use of 
millers. Mr. F. Nell showed a Dust Collector of Howarth's 
Patent, for collecting the dust from the wind discharged by fans 
working in corn mills and other dusty places, and a purifier 
forming part of the same machine. Messrs. Nalder and Nalders 
Rotary Wheat Sizer consists mainly of a barrel with the mesh 
gradually expanded from end to end. A set of movable dividers 
are placed under the barrel, and by a proper adjustment of these 
dividers, which can be made without stopping the revolution of 
the barrel, the bulk of corn is divided into four sizes of equal 
quantity, thus giving an even continuous feed to each first break. 
In Corn Dressing Machines the first novelty exhibited did 
not commend itself to the Judges. In Long's patent, exhibited 
by the Maldon Iron Works Co.^s, No. 1167, the corn after it is 
winnowed is elevated automatically for delivery into sacks by 
a blast of air from the fans. When corn is elevated thus by 
steam power in a threshing-machine, the waste of force is not of 
much consequence ; but it is clear that manual labour is applied 
much more economically when the man stops winnowing occa- 
sionally, so that he may lift the corn by shovel into the sack. . 
In Mr. T. Corheti's New Eclipse VV'innowing Machine, 
No. 2435, the grain is elevated with much less waste of power by 
a creeper. A toothed pulley on the fan-spindle of the machine 
by means of a pitch-chain drives the upper spindle of the elevator, 
as shown in Fig. 25. There are the two delivery spouts to the 
