VINE BORDERS HEATED ARTIFICIALLY. 



143 



wanning the border. The first year the Vines made wood thirty-seven feet 

 long, strong, short-jointed ani well ripened. But the plan was carried out 

 still better at Castle Malgwyn, near Pembroke, the seat of A. L. Gower, 

 Esq., by Mr. Hutchinson, who has described it in the Journal of the 

 Horticultural Society. " The bottom of the border," he says, "is gently 

 sloped from the houses to the extreme edge, where is bmlt a box-drain 

 extending the whole length of the border, as shown in the accompanying 

 section marked 1 ; this drain is one foot square, the top of it being level 



is) BOILER BOILER® 



Fig. XXVIII, — Ground plan of houses, showing cross walls beneath the Vine borders. 



with the bottom of the border, as also shown in section. When this was 

 completed dwarf walls, marked 3, were built across the border, three and a 

 half feet apart, one foot square, in the pigeon-hole manner : on the top 

 of these walls are laid rough flags ; these in reality form the bottom of 

 the border, and upon these is placed about six inches of broken stones 

 and bricks, marked 4, then covered with turf with the grassy side 

 down, to prevent the soil mixing with the stones. There are flues or 

 chimneys at each end of the border and centre communicating with the 

 drains in the bottom, as shown in section marked 2. The top of these 

 flues is nicely made of stone ten inches square, through which is cut a 

 hole of six inches square, into which is inserted a plug of a wedge-like 

 form, so as to fit tightly, but removeable at pleasure ; these flues are 

 about an inch above ground. At the back of the border are placed 

 cast-iron pipes (marked 5), perpendicularly, and also oommimicating 



