THE SCOTS GARDENER 



the door, till the side touch your cheeks, and you 

 may also view across by the side-wall, backsight 

 and foresight, till it stand exactly parallel thereto : 

 then turne, and standing within the door, view 

 straight out by the silk threeds, and so direct one 

 to drive stakes all along as f arr as you can see, in a 

 straight and perpendicular line. You may also find 

 this perpendicular central line, tho' walls, hedges, 

 houses, trees, &c., obstruct your view, if you can 

 see over them from any window, or off any battle- 

 ment, if there is any. 



And as by this instrument you may raise any per- 

 pendicular, so by the same you may let a perpend 

 fall : for you may alter it hither and thither upon 

 the given line, till it direct to the angle or point 

 assigned. 



The mid or central line of your avenue being 

 found out, you must place your cross thereon, and 

 thereby set off half the breadth of it at each side; 

 do this at both ends and middle, that they may be 

 exactly parallel ; and therein drive stakes almost 

 to the head. And when you come to marke out 

 for the trees, or to plant them, set a straight pole 

 at each driven stake for your direction in going 

 straight betwixt the same. 



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