0/ Terrace- Walks. 169 



Bur, to quit this exalted Thought for a 

 while, let us confider the bcft Method of cut- 

 ting and dreffing any H^il into Slopes. 1 have, 

 I think, already, in the lirft Part of this Trea- 

 tife, mention d fomething of the Calculations 

 that every Surveyor ought to make in the 

 drefliog and removing of unlevel Ground ^ and 

 in this Chapter it will be more fully handled. 

 Which that we may better do, we mud have 

 an immediate Recourfe to the rough View of 

 the natural Hill, in Fig. i, Plate 27, and to 

 the Scheme of the fame Hill cut into Slopes, 

 in Fig. 2 of the fame Plate. 



Ohfervations on Fig, i and 2, Plate 27. 



When you firfl: begin dreffing of a Hill, you 

 ought by all means to take its Level from the 

 Top to the Bottom (as will be more plain- 

 ly fhewn, when we come to take in the 

 Level of Spring-Heads) and to draw on Pa- 

 per the Hill, with its Bunches and Excrefcen- 

 cies 5 lince 'tis by this that you muft firfl con- 

 dud your felf in the dividing it into Terraces 5 

 othervvife you may put the Owner to an im- 

 menfeunneceffary Charge, fince it is not re- 

 quir'd, that thofe Terraces that lye under one 

 another, be of an equal Height or Width, but 

 they Ihould be govern'd and determin'd by the 

 natural Line of the Hill, 



In this Example I find the Perpendicular of 

 the Hill is 49 Foot, and the Horizontal from 

 the Perpendicular of the very Precipice of the 



Hill, 



