Report on Miscellaneous Implement Awards at Derby. 617 
inasmuch as it was shown at Carlisle, is such a departure from 
the ordinary mechanism of English drills, that a short descrip- 
tion is desirable. And it may be as well to explain what is 
meant by a positive Force-feed. It is such an arrangement 
as insures that, whenever the feed-cups are filled with seed and 
the drill put into motion, an absolute and regulated quantity 
of seed shall be discharged from each cup ; and this must take 
place in whatever direction and at whatever pace the drill travels. 
Thus, inasmuch as the seed is always above the means of dis- 
charge, there is little or no practical difference in the delivery, 
whether the drill is travelling on the level or on a hill-side. There 
are several different arrangements for securing positive feed. 
Fig. 15. — Seed-wheel set for Fig. 16. — Seed-wheel set for 
large Quantities. small Quantities. 
In Messrs. Coultas' drill, change-wheels are entirely done away 
with, and the quantity of seed is regulated by operating a lever 
which causes the feed-shaft to slide to right or left, thereby 
bringing more or less surface of the feed-wheels to operate on the 
grain. This will be best understood by reference to the foregoing 
illustrations, Figs. 15 and 16, which show the position of the 
seed-wheel set for small or large quantities respectively. 
On the left-hand side of the feed-cups is a scalloped ring, A, 
which revolves with the fluted feed-wheel B, but it is quite 
independent of the seed-shaft to which the feed-wheel is attached. 
The hub or follower, C, on the right-hand side of the cup, 
which does not revolve with the feed-shaft, has a flange, E E, 
at the top and bottom, which completely closes the aperture 
of the feed-cup when the hub is brought into the cup. By 
moving the feed-shaft right or left, all the feed-wheels, being 
fixed on the spindle, are equally influenced, and the amount of 
seed sown depends upon how much of the feed-cup is occupied 
2 T 2 
