Report on the Trials of Implements at Cardiff. 423 
(ihrough the holes upon a fine wire net-worl\, which removes the small seeds ; 
the cleansed chaff and corn are next conducted by a second shog-board to the 
sieve (E). The corn falls thronsh the two sieves (E and e), and passes 
through the sl)Oot (e') to the chamber at the bottom of the elevator (G). 
The fan (F), revolving 680 times per minnte, directs two blasts of air 
against the under sides of sieves (E and e), and canies the chaff to a 
chamber not shown in the section, but which may be seen behind the chaff- 
bag in Fig. 5, page 420; from this chamber three revolving shovels toss up 
the chaff to the small hopper, from which it is delivered by spouts into large 
bags. The chobs — small pieces of imperlectly threshed ears — are separated 
from the corn by (he first blast, and, strikin.;; aojainst the sliding board, are 
delivered into a basket below, and thence removed by hand to be re-threshed. 
Fig. 8. — End Elevation of Messrs. Marshall, Sons, and Co.'s Threshincf 
Machine. No. 5025. 
In threshing; beans a trap-door at the bottom of the elevator case lets the 
beans out as they come from the shoot (c') ; all othrr corn is carried up by 
the elevator-cups to the smuiter (H), which breaks smut-balls and removes the 
awns from barley, and any white cuaU or closely adhering chaff from wheat. 
The smutter-case is a wire-mesh cylinder in a wooden frame ; the smutter is 
a miniature thrcshinu-drum, making 700 resolutions j)er minute, and furnished 
■with three plain beaters arranged obliquely, so that they act as a screw, and 
drive the corn along the lengtli of the cylinder, at the same time that they 
rub it against the wire-mesh, through whicli the dust passes, while the corn 
is rubbed bright in its transit. The amount of rubbing is regulated by a slide 
at the further end of the smutter-case; when this slide is nearly closed, the 
corn is retained a long time, and receives an extra amount of rubliiug. The 
corn as it falls from the smutter is subjected to a second blast driven from 
