Book IV. 



HAND MACHINES. 



274 



371 



provetnent is in having applied a spiral groove, ijistead of the endless screw, by which 

 friction is much diminished, and the lever may rise to any height, without putting 

 the machine out of work. 



2467. The bruising- machine {Jig. 275.), is contrived 

 for the purpose of bruising different sorts of grain, pulse, 

 &c. as well as grinding ipalt. It is a simple imple- 

 ment, constructed with two iron rollfers, of different dia- 

 meters, turned true on their axles or spindles, each roller 

 having a cog or tooth-wheel. A roller with grooves is 

 fixed under the hopper, .to receive the grain from the 

 hopper, and lay it on the two rollers. To one of the 

 rollers is fixed a fly-wheel. 'Hie machine is made to be 

 worked by hand, or any other power. The upper wood 

 frame is made to slide, and is regulated by a screw, ac- 

 cording to the size of the grain, and will bruise it more 

 or less, as may be required. 



2468. Of hand-drilling- fhMchines, there are a great 

 many different kinds of various degrees of merit. 'Ilie 

 sort to be recommended in any particular case will 

 depend on the texture of the soil ; one which would 

 answer well in a soft soil or sand might not succeed, 

 in a stoney or loamy soil. As the fashions of drills are 

 continually changing, we advise intending purchasers to 

 describe their soil and kind of culture, as whether 

 raised or flat- drilling, &c. to a respectable implement-maker ; in the mean time we sub- 



276 



mit a few of the established forms 



2469. Tfie bean or potatoe dibbling- 

 machine {Jig. 276.), consists of a single 

 wheel, set with dibber points, and which 

 may be placed wider or closer at plea- 

 sure. It is pushed along by one man, 

 and succeeds on friable soils, but can- 

 not be depended on when the surface 

 is rough or tenacious. Potatoe sets to 

 be planted after this machine should be 

 cut with the improved scoop (2418.). 



2470. The common drill-barrow {Jig. 277.), consists of a frame and wheel, somewhat 



similar to that of a common barrow, with a hopper 

 attached to contain the seed. It is used for the 



I purpose of sowing horse.-beans, turnips, and such 

 I like seeds, upon small ridges. In using it, tlie 

 laborer for the most part wheels it before him, 

 the seed being afterwards covered by means of a 

 slight harrow, or sometimes by a shallow furrow. 



Bb 2 



