Chap- L of Gardening. 



then fixing the Loops at the Ends of the Cord upoii the two 

 Stakes JFand Cr, draw the Loop in the Middle of it to- 

 wards fo that the two Sides of the Cord f'H, and GH, 

 may be ftrained alike. Drive a Stake at juft before the 

 Loop, that is to fay^ in the Angle made by thefe two Lines^ 

 -and ftraining another Cord from E to trace out the 

 I-ine HjE, which fhall be perpendicular to the J-ine C 

 and like to that of the Plan a h. 



The -First Observatiok. 



Tor performing this and the following Praftices, yom 

 may take a Cord of 15 or 20 Fathom long, and make a 

 Loop at each End of it ,- then double it, and ftraining it 

 equally from the two Ends, make a third Loop in the 

 Middle. 



The Sec'onb Oese rvatio^t. 



This Pradice may be performed likewife, by tracing 

 two Portions of a Circle from the Stakes F and Gr, which 

 are equally diftant from the Point E, by means of a fmall 

 Tracing-Pin fixed at the End of the Cord, which will form 

 two Sections in H5 and in the Place where they cut one 

 .another, call'd the Point of Interfeition, plant -the Stake H^, 

 from whence, to that of E, draw the perpendicular Line 

 HE. This Pra(^ice may alfo ferve for all that follow.. 



THE FIFTH PRACTICE. 



^ defcrik with the Inftrument^ a Line perpendicular to a 



Wight Line ginjen. ^ 



Let the given Line traced out upon the Ground be ^ 5, 

 <and let the Stake C be planted at the Point from whence the FIG, 

 Perpendicular is to beraifed, as is marked in the Plan by 

 iix the Semi-circle upon its Foot plum over the Stake C, and 

 dire(fiits Bafe towards the Staked, or towards 5, by means 

 -of the Sights that are upon the Bafc i and turning yourfelf 

 fquare, fet the Moveable Index to 5^0 Degrees^ and^ by the 



N Sights 



