The Trials of Threshing Machines at Doncaster. 
487 
re-threshing, but assuming the amount recovered to be in the same 
proportion as in the first trial, there is a gain in the yield of 
grain as compared with the weight of sheaf corn. 
The best corn in the wheat trials was too much broken, but 
the straw and cavings were clean threshed. The machine made 
a good sample of the barley, but did not separate the seconds 
from the best corn in the oats as well as it might have done. 
TasJiers Machine. — Following on Messrs. Foster's trials, the 
wheat trial of Messrs. Tasker was taken on the evening of the 
same day. The machine having been adjusted, 6,668 lb. of sheaf 
corn were served out, the products being 2,518-5 lb. of firsts, 
160-25 lb, of seconds, 13 lb. of thirds, and recovered from re- 
threshing, 12-25 lb. The horse-power taken was 7-27. 
On the next morning the trial of this machine was resumed 
with barley, when 6,008 lb. of sheaf com were served out, the 
products being 2,629-5 lb. of firsts, -327-5 lb. of seconds, 59 lb. of 
thirds, and recovered from re-threshing, 26-25 lb. The horse- 
power was 7-68. 
In the half-hour's run with oats which followed, 3,052 lb. of 
sheaf com were served out, the products being l,166-51b. of firsts, 
36-25 lb. of seconds, 12^ lb. of thirds, and recovered from re- 
threshing, 3^ lb. Horse-power 6-95. The power taken to run 
idle was 4-0 h.p. 
This machine separated the firsts, seconds, and thirds very 
regularly. The straw and cavings were clean threshed, but in 
the barley too much com was left in the cavings. The oats 
were very well threshed. 
Coultas's 3/ac/iMie.— The next machine to be tried was that of 
j\Ir. Coultas. The sheaf corn served out during the hour's run was 
6,972 lb., the grain products being 2,619-25 lb. of firsts, 31-5 lb. 
of seconds, 16-75 lb. of thirds, and 8-5 lb. of fourths ; recovered 
from re-threshing, 23-|- lb. The power taken was 8-15 h.p. 
During the barley trial of one hour, 3,488 lb. of sheaf corn were 
served out, and the grain products were 1,587 lb. of firsts, 107 lb. 
of seconds, 51 lb. of thirds, 18-5 lb. of fourths, and recovered from 
re-threshing 33-5 lb. The power taken was 7-66 h.p. 
For the half-hour run with oats, 1,692 lb. of sheaf coi'n were 
served out, and the yield in grain was 801 lb. of firsts, 27 lb. of 
seconds, 121b. of thirds, 91b. of fourths, and recovered byre- 
threshing, 7-25 lb. The power taken was 8-42 h.p. 
In all these runs the feeding and consequent running of the 
machine were most irregular. Far too much of the best corn 
was left amongst the seconds and thirds. The thirds nearly 
equalled the seconds ; in fact, all the corn was badly separated in 
t;be wheat trials. The barley was not as clefm threshed as it, 
