the Philadelphia Centennial Exhibition. 
•11 
risk of losing the wheels. Notwithstanding this, 1 am satisfied 
that the old plan is by far the best. In support of this view, the 
Judges in their Report directed attention to a comparison of 
results in the case of Bichford and Huffman s machine and in 
that of Ludlow and Jiodf/ers. These machines are identical in 
construction except that the former regulates the delivery by a 
change of wheels, the latter by closing the outlet, yet the result 
was much in favour of Bickford and Huffman. The difference 
of discharge from different cups of the latter ranged during the 
trials from 1£ oz. to If oz., whereas in Ludlow and Kodgers's 
drill the range was from 2£ to 5h ounces. 
[n the McSherry Drill from Dayton, Ohio, the force-feed roller has spiral 
ribs, so that before one rib has finished discharging, at one side, the next rib, 
carrying up an equal amount of grain, 
Fig. 31.— McSherry Drill Force- 
feed Spindle. 
has commenced discharging on the 
other side. A patent washer is at- 
tached at the end of the wheel. The 
feed-wheel and washer are illustrated 
in the annexed cut, Fig. 31. The 
seed -cups are fixed in the bottom of 
the hopper, so they are constantly 
full of corn. No attention whatever 
is required to insure regular discharge. 
It will be seen by the drawing, Fig. 
32, that the opening for the discharge 
of the seed is considerably above the 
bottom of the cup ; the object of this is to prevent waste of grain whilst the 
drill is being travelled when not in work. This is an exceedingly strong, 
well-made machine, especially commendable for a patent iron lift-bar, which is 
strong, neat, and durable. 
By raising the bar, the Fig. 32.— McSherry Drill. Seed-cup, and 
hoes are withdrawn from Spindle-knife in interior. 
the ground, and the flow of 
grain so instantaneously 
cut off that not a grain is 
wasted. The grass seeder 
is thrown out of gear, and 
the land-measure raised 
so as not to measure. The 
latter, which is attached 
to several of the best ma- 
chines, is a small appara- 
tus for indicating the area 
traversed during work. It 
consists of a thread on 
the seed-spindle actuating 
a small - toothed wheel, 
which drives an indicator on a dial-plate : as all motion is communicated from 
the seed-shaft, it only registers during actual work ; and thus, without pre- 
tending to absolute accuracy, for it is clear that inequalities of surface as well 
as the size of the change-wheels employed will affect the result, we have a 
usetul approximation, a guide to the operator as to the distribution of the seed, 
and a tell-tale for the master as to his servants' industry. 
