FRUIT-TREES. 39 



will fill when come to its full growth : 200 

 fquare feet of wall fhould be allowed to 

 a pear-tree of the moft vigorous growth, 

 upon a free flock, and 1 50 to thofe upon 

 quince flocks ; and the fame for apricots, 

 or almonds, and feme of the largeft cherry 

 and plum-trees 3 other kinds of cherries, 

 and plums lefs vigorous, fliould have 120 

 feetfquare allowed them, and the like fpace 

 for peaches and neftarines. 



When the fpaces of wall defigned for 

 each tree are known, at the extremities of 

 fuch fpaces pillars fliould be eredled, from 

 which arches may be fprung, whofe crown 

 or top ought to be level with the furface 

 of the border, and the trench in which 

 they fland three feet lower 5 their length 

 and breadth in proportion to the flrength 

 of the foil : if the foil be a ftrong clay, or 

 rock, a fquare of two feet for the bafe of 

 each pillar will be fuflicient, but if it be 

 a loofe earth or fand four feet fquare at 

 the bafe will be required, and fhould have 

 a floor of oak or elm planks made faft to 

 joifls of the fame timber, (yew, could it bt 

 had, would be better) to fix the mafonry 

 upon. 



D 4 There 



