APPENDIX. 13 



ft, when they are placed againft the hill, and in fuch 

 fituations there is no hazard of finishing them off at 

 once ; but when the whole of the back muft be form- 

 ed, as is the cafe in the annexed fketch, two feafons 

 are neceflary to complete them, in order to give the 

 mould time to confolidate. 



The greateft care muft be taken in building this kind 

 of fence by a frame or gauge, which muft be reduced 

 on one fide, and perpendicular on the other ; or, if the 

 back part of the frame leans a little from the perpen- 

 dicular towards the wall, it will be found {till better. 

 But the fafeft manner of building this kind of dry wall 

 is, to have the frame in two parts, one four feet high, 

 and another about three feet, which, with a double 

 courfe of fods, will raife the wall to nearly eight feet, 

 which is the height ufually adopted here. In making 

 the gauges, the beft way is firfl to make one to the 

 fall length of about feven feet and a half, and cut it 

 after to the lengths required ; this will be found the 

 moft accurate way. A range four feet high may 

 be firft carried on to any length, and afterwards come 

 on with the fecond range, in which the ihort gauge is 

 to be ufed. 



Perhaps 



