401 



SCIENCE OF AGRICULTURE. 



Tart IL 



seven or eight inches, l>y a screw through the axletree, which is turned by a small handle 

 (^')> so tnat the bind pail of the barrow, by this simple mode, is also regulated to the 

 depth at which it is found necessary to work. -J. When the harrow is drawn to the head 

 or foot lands, the regulator is pressed down to d, and the fore wheel (m) is then allowed 

 to pass under the fore bar (/»), by which the nose of the harrow is lifted, and the points 

 of the fore tines [till) will then he taken two or three inches out of the soil, which affords 

 the means of turning the harrow with the greatest facility. 5. Being made of malleable 

 iron, its durability may he said to he endless; whereas, if made of wood, the prime cost 

 would he entirely lost at the end of every live or six years. Lastly, the mode of working 

 is so easy, that any boj of ten or twelve years of age is perfectly qualified to manage it. 

 Next to Wilkic's brake, we consider this the most valuable of pronged implements, and 

 think that, like Wilkie's implement, it might be substituted for the plough, after drilled 

 green or root crops, on light soils generally. Some account of the astonishing powers of 

 the implement, as exemplified in breaking up Hyde Park, London, in 1826, will be found 

 in the Gardener's Magazine, vol. ii. p. '-'50. 



2658. H'cir's improved cultivator (Jig. 325.) is a very cficctive implement of this kind, 



with nine coulters or prongs. It may be set to go more or less deep by raising or 

 lowering both the fore and hind wheels. 



2659. The Scotch cultivator or grubber (Jig. 326.) was formerly considered one of the 

 best implements of this kind, as a substitute 



326 



for the plough ; but it has since been super- 

 seded by Finlayson's self-cleaning harrow. 



It consists of two strong rectangular frames, 



the one including the other, and nine bars 



mortised into the inner one, with eleven 



coulters or prongs with triangular, sharp- 

 edged, dipping feet, four cast-iron wheels, 



and two handles. All the cutters are fixed , 



in these bars, except two which are placed 



in the side beams of the outer frame, and 



may be set to go more or less deep by means 



of pins and wedges. It works iis deep as 



the plough has gone ; and by the reclined 



position of the coulters, brings to the surface all the weed roots that lurk in the soil. 



Leans and peas have been sown in 

 spring on the winter furrow, after beng 

 stilled by the grubber; and barley also 

 after turnips, without any ploughing 

 at all. This implement is made of 

 different sizes, and may be worked either 

 by four or by two horses, and one man. 

 2660. Parkinson's cultivator (fig- 

 327.) has been found a very useful im- 

 plement, both for stirring and cleaning 

 land. Its inventor recommends that 

 where the land is foul from couch, sods, or any other cause, the number of teeth or hoes 



should be reduced to five or seven ; two or three being placed in the fore bull, and four 



in the hindermost ; increasing them to nine as the land becomes in a fine condition. 



