[ 2SI } 



few yet contrived which arc not too expenfive, or 

 of too nice and complicated a conftrucrion to be 

 made or repaired by common workmen. 



This has alfo prevented trials from being mad c 

 of the drill-culture, in fo general a manner as to 

 determine, by proper experiments, whether or not 

 it was fo advantageous as Mr. Tull has ftated it 

 to be. 



It is more than thirty years fince I began to 

 ufe drill-ploughs; but finding thofe I firft pro- 

 cured good for nothing, and not being able to 

 get a workman who could make one on Tull's 

 plan, I found myfelf obliged to abandon the drill- 

 hufbandry. 



Before drilling can become general, drill -ploughs 

 rnuft be fimple, and fuch as a common ploughman, 

 accuftomed to ufe ftrong instruments, can ufe 

 without breaking; and fuch alfo as common work, 

 men can eaiiiy make or repair. 



Mathematical accuracy, however, is not re- 

 quired for delivering the feed; for it matters very 

 little whether there be a quarrer of a peck more 

 or lefs fown, if it be delivered with tolerable re- 

 gularity. 



T 3 Some 





