Award of Medals, S^c. , at Kilbum. 
739 
pinions; four different sizes, varying from 11 to 8 cogs, are supplied. The 
11-cog pinion is to work with the large hoe, the 10-cog with middle hoe, and 
the 9-cog with the smallest hoe, the 8-cog pinion with the smallest hoe, when 
it is desirable to cut very close. The pinions are readily replaced ; and to 
adjust the bevel wheel, all that is necessary is to slack back the collar on the 
boss of the bevel wheel, and shift the same for a pin to screw into a hole, farther 
from or closer to the wheel, as the case may require. The hoe-blades are 
fixed to stems, which can be shifted along the coupling-rods to suit any width 
of ridge. The road-wheels are also capable of expansion. The machines can 
deal with drills from 18 to 30 inches apart. They are made either for single 
or double rows ; the latter are decidedly more economical. Price from 8?. 10s. 
to 101. 10s., according as single or double action is preferred. The hoes will 
remain in any jjosition they are put in, without the attendant retaining hold 
of the handles. This implement has already gained several medals, and I 
regard it as a valuable invention at this time, and a decided advance upon 
previous efforts. 
Mons. Nicolas Noel, of 60, Rue d'Angouleme, Paris, received 
second-class mention for the valves of a force-pump, and for the 
very simple manner in which, by unscrewing four bolts, the upper 
portion of the pump can be opened and the working parts got at. 
This will be seen at a glance by the following sectional drawing. 
rig. 32. — Section of Mons. Nicolas Noel's Force-pump. 
The upper casting is hinged to the lower at a. The suction- and delivery- 
valves are shown at h h. The ball-valves are either of vulcanised india- 
rubber, or, for greater force of discharge, metal is used. They are 2 inches in 
diameter, over 1^-inch apertures. The seats are screwed in. The barrel is 
5j inches diameter. The maximum stroke is 51 inches. Thirty revolutions per 
3 D 2 
