I 



\ 



A 



. ^ 



ND 



yVf^ 



IMPROVEMENT OF THE DRILL PLOUGH. 



The firft experiment I tried to improve this valuable machine was 

 that mentioned in Sea. XII. 5. of this work^ by enlarging the axis 

 of Mr.Tuirs feed-box into a vi^heel of fixteen inches diameter, with, 

 excavations in the-rim to raife portions of the corn above the furface 

 of that in the feed-box. But I found to my furprife the fridion of 

 the corn to be fo much greater than expeded, when fix fuch large 

 wheels were immerfed in it, that an additional hopper became nc- 

 celTary to deliver the feed flowly into the feed-box, as in Mr. Cook's 



drill plough 



which 



would add much to the intricacy and 



pence of the machinery, and to the inaccuracy of the quantity of feed 



:cafioned me to relinquifh that idea, and after many de 



delivered, 



figns and 



many 



periments to conftrud the follow 



& 



machine 



which I believe to be more fimple, and confequently lefs expenfive 

 to conftruft, and lefs liable to be out of order, and to deliver the feeds 

 of allkin^s with greater accuracy than any drill plough at prefent ia 

 ufe; and that it poffeffes every other advantage that they can boaft. 

 The fcale of the three following plates is half an inch feo ten inches. 



i' 



.,--'■ -^ 



ConJlru6iton of the Carnage Fart 



Plate X. Fig. I. «<? 



9 



the fhafts for the horfe, which are fixed 



to the center of the axle-tree by a fimple univerfal joint 



> 



whence 



4 



