SCARIFYING, OR GRUBBING. 



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FINLAYSON S SELF -CLEANING HARROW. &quot; This is an efficient 

 implement for cleaning lands under tillage from couch grass and 

 other weeds ; the curvature of its teeth being so formed as to 

 bring to the surface all weeds and vegetable rubbish.&quot; 



This was among the first improvements of the kind, and has 

 been followed by a great many other inventions, of which I 

 shall offer only two other examples. The first is, 



KIRKWOOD S GRUBBER. &quot; The leverage that is obtained by 

 pressing on the handles or stilts of this machine, whether in action 



or at rest, is so simple, and yet so powerful in its effect, as to reg 

 ulate the depth of the tines to the greatest nicety ; or, in cases 

 of obstruction, to throw them out altogether. It is an admirable 

 implement, and well deserving the high commendation generally 

 bestowed on it.&quot; Objections have been made, however, to the 

 form of its teeth. 



The next instrument which I shall notice is called the Uley 

 cultivator, and made at the iron and agricultural implement 

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