xii PREFACE. 



enable the Perfon who follows the Drill to keep 

 it from falling off the Middle of the Ridge. It 

 may alfo be ufeful, in wet Weather, to double 

 the Drills ; by which means Two Ridges may 

 be fown at the fame time, the Horfe going be- 

 tween them : For the Planks of Two Drills, 

 each Plank having one of the Shafts fixed to it, 

 may be joined End for End by Two flat Bars of 

 Iron, one on each Side^ well fecured by Iron 

 Pins and Screws ; and, by correfponding Holes 

 in the Planks and Bars, the Diftance between 

 the Drills may be altered, according to the dif- 

 ferent Spaces between the Ridges. 



The Alterations made by the Editors of this 

 Impreffion are little more than omitting the con- 

 troverfial Parts of the Book, which were judged 

 of no Service to the Reader, as they no- ways af- 

 fected the Merits of Mr. Tul/'s Principles. 



But as he endeavoured to recommend his 

 Theory by drawing a Comparifon between the 

 Old Method of Culture and the New, fo we 

 beg leave to annex a Computation of the Ex- 

 pence and Profit of each -, for which we are 

 obliged to a Gentleman, who for fome Years 

 pracYned both in a Country where the Soil was 

 of the fame Nature with that from whence 

 Mr. Tull drew his Obfervations, viz. light and 

 chalky. And we chufe to give this the rather, 

 as it comes from one who has no Attachment 

 to Mr. TuH's Method, farther than that he 

 found it anfwer in his Trials, We appeal to 



Experience* 



