s 



no The PraBice Part IL 



and ftiff enough to lie without bending^ Upon the Middle 

 vof this Rule fet your Level, as you fee at the End^, fo 

 that the Plummet at the End of the Line, fix d to the Head 

 of the Level, light and fall exactly upon the Notches made 

 on purpofc in the Angle, and upon the Crofs-Leg of this 

 Inftiument. If your Level rife higher on one Side than the 

 other, fink the Stake on that Side it rifes, till it be of the 

 fame Heiglit as the other i and in this Manner order thefe 

 two Stakes, by raifing and lowering them, till the Level be 

 exad. Then take the Level off the Rule, and placing your- 

 felf at the End ^, caft your Eye along the Rule, and direct 

 Stakes to be drove, at convenient Diftances, the whole 

 Length of the Enclofure, as from AtoB and let them be 

 funk or raifedfo that their Heads ftand exad to the Height 

 of the Rule and exceed not the Line of AimDD. This 

 FIG. L done, mealure the Stake at the End B, whofe Height, for 

 Example, let be fix Foot: Meafure likewife one of the two 

 that bear the Rule at the End whofe Height fuppofe but 

 half the other, that is to fay, three Foot. Take the Diffe- 

 rence of thefe two Heights, which is three Foot, and di- 

 vide it into two, which makes one Foot and a half ^ and 

 caufe a Foot and a half of Earth to be taken from the Ex- 

 tremity and brought to that of B j but take heed, in 

 removing this Earth, you ftir not your Stakes and your 

 Rule, which may be of farther Service to you. You are 

 fure, by this Operation, to have the Line CC perfeftly level^ 

 being parallel to the Line of Aim D D* The Reafon of 

 which is, that the Stakes having fix Foot Height at the End 



and having but three at the End A^ in lowering the 

 Ground a Foot and a half at A^ and raifing it as much at 



the Stakes will be four Foot and a half high equally 

 throughout, 



THE SECOND PRACTICE. 



To lay a Piece of Ground Jirait and eauen^ according to a 



Len)el Line» 



To make the Level Line CC entirely ftrait at^d eaven, af- 

 ter you caufed the Earth to be moved in grofs from the 



End 



