FRUIT-TREES. 43 



inches deep in the middle, and three inches 

 deep on each edge, which when it was fet 

 and come to a proper degree of hardnefs, 

 was laid upon the wall, and anfwered the 

 end very well. There is likewife made by 

 Mr. Henry Graves, jun. of Newark upon 

 Trent, in Nottinghamfliire, artificial ftones 

 for this and other ufes ; the ingredients are 

 chiefly lime, plaifter, and fand, and are 

 much cheaper than ftones brought from 

 far diftant places. But it muft be obferved 

 that the plaifter-copings will fwell when 

 new ; {o that there ought to be a fpace of 

 about an inch left between each length, 

 otherwife they will not lie clofe to the 

 walls. 



All kinds of copings ought to have a 

 hollow made from one end to the other, 

 with a gowge, or any inftrument of that 

 fort, on the under-fide, about half an inch 

 deep, and as much from the edge thereof; 

 for without this hollow, when they proje6t 

 only two inches, the water will fometimes 

 follow the underfide of the coping, and 

 difcharge itfelf down the walls, by which 

 they are decayed when froft: immediately 

 ienfues. 



As 



