and rolling is not derived from pulverizing en- 

 tirely, but alfo from fubdividing.* and enabling 

 the plants to tiller, (as I believe it is termed.) 

 The harrow certainly breaks the incruflation on 

 the furfacc, and the roller crumbles the clods; 

 but it is alfo obvious, that the harrow removes a 

 great many of the plants from their original fta- 

 tions; and that if the corn has begun to tiller at 

 the time it is ufed, the roots will be, in many in- 

 ltanccs, fubdivided, and then the application of 

 my f\lKm of divifibility comes into play. The 

 roller then ferves to plant the roots, which ha\<: 

 been torn up by the harrow. 



Such is my cnthufiafm, that I am induced to 

 eftablifh this hypothefis, and leave it to the coQt- 



• We doubt not the good cffccls of harrowing and rolling both 

 wheat and Cummer corn, for the very good reafons given by the 

 Norfolk and Eflex farmers for their practice. But we apprel <.n ', 

 that with refpccl to the harrows dividing the roots of the plant i 

 when they begin to tiller^ our ingenious correfpondent is too (an- 

 guine in his expectations. The teeth of a harrow are too large 

 and blunt to divide roots fo fmall and tenacious as are thofe of grain; 

 and whenever fuch roots (however tillered) (land iu the line any 

 tooth makes, they will, if fmall, be only turned on one fide j>y the 

 earth yielding to their lateral prelTure, or if large, the whole root 

 robably be drawn out of the ground. In our opinion, therefore, 

 the principal ufes derived from harrowing and rolling thefe crops ar< , 

 opening the foil between the plants, earthing them up, breaking Jhe 

 clods, and clofing the earth about thc^r roott. 



federation 



