27ifl Triab of Thresldncj Machines at Donoaster, 493 
Messrs. Gibbons & Robinson's (No, 4142) and Messrs. Tasker's 
(No. 4144) equal second, and it was decided to dass the imple- 
ments in accordance with these results. 
The following is a detailed description of the three prize 
machines. 
Fodens Machine. — The special feature of this machine (see 
opposite page) consists in the employment of aa exhaust fan for 
the first and second dressing of the grain, as also for the eleva- 
tion of the chaff and its delivery into bags. 
The fan (D) is fixed on the left side forward. The gi'ain and 
other material, passing through the caving riddle (A), are led by a 
return board (B) to a chaff" riddle (0), which receives a shaking 
movement, causing the grain to pass along the board to its edge, 
and to fall over it. Air is drawn through the riddle (0), 
the lighter materials being carried into the centre of the fan, 
and, passing through it, are delivered by the channel (II) 
into sacks or through a canvas pipe 13 in. in diameter to a 
convenient distance. The outer casing of the fan is perforated 
to allow of the escape of dust from the chaff". The grain 
passes through the riddle on to the return board (G), and 
from this on to the lower riddle (ff), which stops the larger 
impurities and allows the grain to pass through on to a seed 
riddle. Here the seeds are separated, the grain passing through 
a spout to the elevator, which raises it to the upper part of the 
machine, where it is delivered by means of a worm into the 
awner. The awner and smutter ar3 in one apparatus, and con- 
sist of a cylinder 13 in. in diameter by 9 in. long, roughened 
inside by hemispheres of about ^ in. diameter, 1 in. pitch. With 
this revolves a shaft whifcli carries three sets of four arms of 
peculiar shape, which work through the grain, breaking off" the 
awns and disengaging the smut. These arms are in halves, and 
can easily be replaced by others of diff"erent shape if necessary. 
The grain passes from the awner by a door so adjusted as to 
off"er a suitable amount of resistance, this being regulated by a 
weighted lever. The grain falls over inclined louvre boards, 
which have a vibrating motion imparted to them from a lever 
and rods (T', I) in connection with the shoe. Through these 
louvre boards a current of air is drawn in by a special fan on the 
spindle of the smutter ; it takes an upward direction, carrying 
with it the lighter corn and delivering it into a chamber, the 
lip of which is adjustable, so as to vary, according to circum- 
stances, the distance through which the light corn has to be 
lifted. The strength of the blast from this fan can also be 
regulated by a shutter which can be opened or closed from the 
