5 f o OfRiDGES. Chap. XVL 



alter'd by this Change of Fofture ? No, for their Bot- 

 toms would beat the fame Diftances, becaufe not re- 

 moved ; and their Tops, becaufe the fame Line holds 

 them, at the fame Diftances in both Poftures. 



Mr. Bradley's Lines, drawn from the Trees below, 

 which are one Perch afunder, make the Two Rows 

 of Trees falfly feem to be at equal Diftances, becaufe 

 thefe Lines are parallel to each other : But this is a 

 Deceit; for, in Truth, the Diftances of the Trees 

 are not meafured by the Diftances of thofe Lines, but 

 by the extreme Points at the Ends of the Lines (a) ; 

 and thofe Two Points above, where the Lines cut 

 the Row obliquely, and at unequal Angles are twice 

 as far afunder as the endmoft or extreme Points below 

 are, where the Lines cut the Row at right Angles. 

 Hence may be inferr'd, that there is Room for twice 

 as many Trees to grow on the Hill as on the Bafe, 

 and twice as much Grain for the fame Reafon ; be- 

 caufe- there is twice the Surface for the Roots to 

 fpread in. And fince Mr. Bradley allows the Hill to 

 contain Two Perches to One of the Bafe, and the 

 Soil of both to be of equal Goodnefs \ and yet affirms, 

 that the Two can produce no more of Grain or 

 Trees than the one Perch can ; I cannot fee, why 

 it fhould not be as realonable to fay, that Two Quar- 

 ters of Oats will maintain an Horfe no longer, nor 

 better, than One Quarter of Oats, of equal Good- 

 nefs, will do. 



In Page 13. he concludes thus: c That Hills, in 

 f their Meafure, contain only as much profitable 

 c Land as the Plain or Plat of Ground they ftand 



* upon ; and as a Proof of that, all Vegetables or 



* Plants have an erect Method of Growth.' 



This Proof of Mr. Bradley's is founded upon an 

 Argument which has no Confequence, unlefs it were 



(a) Thefe upper Trees are meafured by the unequal Length 

 of the Lines, not by their parallel Diftance, as the lower Trees 

 ?re i therefore his Meafure is a Quibble. 



firft 



