[ 8 ] 



little more cxpencc; that is, the Double Plough y 

 which ploughs two furrows in the fame time any 

 other does one. This plough requires only three 

 horfes and a man, but no driver. I have feen it at 

 work in a large field, and go perfedlly (Iraight from 

 one end to the other, without the ploughman's ever 

 putting a hand to it. 1 believe thefe two laft ploughs 

 are the lateft and greateft improvements which have 

 been made in this inflrument for general ufe. 



There are others of a more modern invention 

 ufed for particular purpofes, of which that with two 

 mould-boards is a valuable invention. With this 

 plough I make the open furrows for planting po- 

 tatoes, and then compleatly cover the fets by fplit- 

 ting the ridges. When they have been horfe-hoed, 

 it again fplits the ridges in the intervals, and earths 

 up the plants. It efFedually anfwers the fame pur- 

 pofe in all broad drilled crops where the horfe-hoe 

 is ufed, and with half the labour performs the fame 

 work as could be done with the common plough, 

 and in half the time. 



There are other ploughs of lefs general ufe, fuch 

 as the trenching-plough, which fometimes goes to 

 the depth of eighteen inches; draining-ploughs, 

 and ploughs for denfhiring and felling i and laftly, 

 I fhall mention a fmall light plough for ploughing 



thq 



