Chap.l O F P L O U G H S. 427- 



at every firfl cut of the plough, a very little attention will remedy that 

 inconvenience. It is only inclining the handles of the plough to the 

 right or left, inftead of holding them even. The whole plough 

 will incline with the handles, and the fliare will then enter into the 

 ground with eafe, and open the iirll: furrow. The other furrows are 

 plowed without any fort of difficulty; and for them, the plough is 

 to be held even, or inclined but very little, either to the right hand or 

 the left, as the fituation of the land may require. 



M. de CliBteau-vieux fays he generally refts the beam on the 

 left hand fide of the fore-carriage. It is eafy to place it fo as to leave 

 whatever diftance is thought proper between the outmoft row of 

 corn and the furrow that is adlually plowing. 



The forwarder the wheel is fet, the deeper the plough cuts: and 

 fo on the contrary. But if one would have it cut ftill deeper, or 

 fhallower, than it can be made to do by altering the pofition of the 

 wheel ; that too may eafily be effedled. By loofening a little the 

 wedge above the beam, p, o,Jig. i. and driving farther in thewodge 

 q, the plough will cut lefs deep : as, on the other hand, the fiiare 

 will be more inclined, and therefore cut deeper, if the wedge q, under 

 the beam, is loofenedj and the wedge p,o, over it, is driven in tighter, 



SECT. II. 



Defcription of M. Duhamel'j plough, ufed in the experiments at 



Denainvilliers. 



'X^HE chief difference between M. de Chateau-vieux's plough, 

 "■' and that of M. Duhamel, are as follow. 



1. The beam of this laft, ACB, Plate III. is bent from Cto Br 

 whereas that of M. de Chateau-vieux's is nearly ftrait all along. 



2. In confequence of this curve, the hindmoft extremity of M. 

 Duhamel's beam, is joined at B to the hindermolt part of the ground- 

 reft E, after pafling through a mortife F, in the lower part of the 

 handles : fo that this beam is joined to the ground-reft by its extre- 

 mity 5, the bottom of the handles F, and the llieat G; wdiilft that 

 of M. de Chateau-vieux's plough, is joined to the ground-reft by 

 this fheat, another which this plough has not, and the lower part of 

 the handles : for the beam does not anfwer to the ground-reft. 



3. The mould board HI of this plough, is lighter than that of 

 M. de Chateau-vieux's, and differently Ihaped. 



4. The two handles KK, are at equal diftances fiom the beam, 

 and are joined together Jsy a crofs ftafFM. 



I i i 2 5. The 



