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we ought to begin at the Top firft, and fo 

 work downward ^ for this Reafon, that the 

 Earth is very eafily tumbled down 5 on the 

 contrary, one can't throw it upwards but with 

 the greateft Difficulty. 



To go on then in our Work Cwhich is 

 fomething difficult) you are to find wherea- 

 bouts your hypothenufal Line ab falls ^ 

 which hypothenufal Line behig 35 Foot, you 

 are to divide by 5, and multiply it by 

 2, and that gives you the Perpendicular of 

 this Slope, and confeqaently the Horizontal. 

 See the fame illuftrated by Example, 



The Length of the hypothenufal Line, 

 which the Gardener ought to have upon a 

 Line, and to fix it difcreetly in, fo as to hu- 

 xnour the Nature of the Hill, (and the fame 

 does by Compaffes on the Paper) being 35 

 Foot, do as underneath, viz. divide by 5, as 

 has been already taught 5 



5)35(7 



the Quotient being 7, multiply it by 2, and 

 that gives 14, which is the Perpendicular of 

 the Slope, equal to 35, the given Hypothe- 

 nufe 5 and this, by Confequence, makes the 

 Horizontal to be 28 Foot, according to the 

 leafl Proportion we allow of the Horizontal 

 to the Perpendicular of a Slope. 



To do this upon the Ground, fix a dead 

 Level at a. Fig. 2, Plate 4, as a c, which 

 we fuppofe to be two Stakes, upon which we 



place 



