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are intended to be grown, the length of the house 

 ought to be about 28 feet, by 12 feet 6 inches wide 

 inside, surrounded by a nine-inch wall ; where the 

 foundation is good, five feet will be high enough for 

 the wall at the front and ends, which ought to be one 

 foot above the ground level. The height of the back 

 wall, nine feet ; three apertures to be left about three 

 feet from the top of the wall ; they ought to be one 

 foot high, and three feet wide, so that two vines may 

 be turned out through each hole, in the winter, after 

 their wood is ripe. They may be fastened along the 

 wall, and if kept dry, will need no other protection ; 

 they may either all be in and started at once, or at 

 different periods (and the apertures built up again), 

 according to the owner's demand. The back retain- 

 ing wall of the tan bed must be built on piers, leav- 

 ing arches for the vine roots to pass through into the 

 prepared compost underneath the pines. The piers 

 will have to be nine inches thick ; above which, a 

 cavity must be left from the heated chamber to the 

 top of the wall. The alley at the back ought to be 

 at least three feet wide ; end alley, 21 inches ; front 

 alley, 20 inches. The boiler must be fixed at either 

 of the north corners of the house ; it will require two 

 flow and two return pipes attached to it ; two pipes 

 must be stretched along both ends and front, to heat 

 the atmosphere in the house, and ought to be six or 

 seven inches diameter. Each pipe must have a stop- 



