/(?r Gardeners, &c, 37 



Hollow of 145 Foot 6 Inches Jong, and 106 

 Foot 9 Inches wide, kt us reckon how we 

 fhall belt order our Matters, ih^r it may be 

 reduc'd into our intended Form, without the 

 Expence of carrying any of it away, or bring- 

 ing any m )re in to compleat our Level. 

 • Were the Sides of this Hollow perpendi- 

 cular, the finding out a proper Depth would 

 be the eafier -^ but, fince there are to be Slopes 

 into the Hollow, it makes fome Rebate in tlie 

 Difpolition, and Depth of the Hollow. At 

 firft View, then, any Perfon of the leafl Expe- 

 rience may fee, that this Hollow we have 

 been fpeaking of, will be about 6 Foot deep 5 

 and, according to the common Allowance 

 of three Foot horizontal to one Foot perpen- 

 dicular, the Balis of the Slope of each Side 

 will t^ke up 18 Foot, and the fame at tie 

 Ends 3 fuppofing you allow the fame Horizon- 

 tal. 



This being rightly underftood, we ought 

 then to make our Computation from the Mid- 

 dle of one Slope, to the Middle of the other. 



To7t are then firji to multiply the Length 

 hy the Depths aiici divide that by the 'Number 

 of Feet contain din the great Hollow^ 18 ioot 

 at each Side and each End for the half Per- 

 pe?idiciilar of the Slopes 5 an J it Jlands thus : 



D 3 See 



