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88 The PraBice Part II, 



THE SECOND PRACTICE-. 



To draw a Right Line upon the Ground^ h) t'he help of Stales. 



Suppose the Line to be drawn be found upon the. Plan 

 to be a hundred Fathom long, -as the Line cd^ drive a Stake 

 mto the Ground upon one of che Extremities of this Line, as 

 TtG. iL at and another at the Extreniicy 5, diftant a hundred 

 Fathom one from another s and, in a Line with thefe two^ 

 let another about the Middle., as at C; thus divide the whole 

 Length AB^ into fo many Parts, that none may exceed 12. 

 or 1 5 Fathom ; and ftraining a Cord from Stake to Stake, 

 trace the Line at feveral Times, according to the foregoing 

 Practice. You may afterwards take away the longer Stakes 

 or Perches that ferved for ranging, and fix fliort Stakes or 

 Spikes, pretty near one another, for finding the Track agaia 

 moi'e eafily, if it fliould be defaced. 



THE THIRD PRACTICE. 



To prolong a Right Line upon the Ground. 



In this Praftice, the Line to be prolonged is fuppofed to 

 be the Range of a Wall, or of a Building, as a b* Place 

 yourfelf at the Extremity, oppofite to that which fliould be 



^ I G. III. prolonged, as at and caufe a Stake to be fixed beyond the 

 Corner B, as at C, in fuch manner that this Stake fwerve 

 not from the dired Line A B, towards D, or towards E, 



, and then trace out the Line B C, by one of the preceding 



Practices, according to the Length of it. 



THE FOURTH PRACTICE. 



To defcribe^ with the Cord^ a Right Line^ which floall be 

 fqmre or perpendicular to another Right Line already traced. 



Let the Right Line traced upon the Ground be CD, and 

 the Stake E planted at the Point, from whence the Perpen- 

 dicular fliould be raifed : Carry on each Side the Point 

 F I G. IV. about fix or eight Fathom^ and fet two Stakes there^as Fand G^ 



then 



