This experiment shows what can be done; though it must be obvious that a considerable part of the saving in time is lost by the small size of the fruit. Mr. Baldwin, in our opinion, has hit on the proper use of this mode, the principle of which, as already observed, consists in the employment of the otherwise lost vigour of the old stock. He contrives to produce tolerably sized fruit, and to have such a degree of vigour in his suckers, as that they are able, in their turn, to throw out other vigorous suckers to succeed them. In aid of this, he often earths up the old stock, so as to cover the lower end of the sucker; and partially wrenching it off, he, by these means, obtains for it a good stock of roots before he renders it an independent plant. Where heat is to be supplied from fermenting horse-dung, we should recommend for trial a pit invented by J. West, of Castle Ashby, in Northamptonshire. (_fig. 22._) Nine years’ experience enable its inventor to recommend it for neatness of appearance, the power of regulating the heat to the greatest nicety, and for forcing asparagus, strawberries, and the most delicate kinds of cucumbers. By raising the walls of the pit higher above the earth, it is evident it would answer equally well for growing Pines, or forcing shrubs or tall growing plants. The dung is placed in a chamber (E) three feet and a half deep, being about eighteen inches below the surface-line; the walls (G) which surround it are nine-inch brick-work; both on the front and at the back of the chamber are two openings (A), about two feet six inches square each, with moveable doors, through which the dung is introduced; the doors fit at bottom into grooves (B), and are fastened by a wooden pin and staple at top. In front of the doors, is a small area (C) sunk in the ground, surrounded by a curb of wood, by which the introduction or removal of the dung is facilitated. Along the centre of the chamber is a bar (D), which serves as a guide for packing the dung; and across the top, at intervals of twelve inches, are placed, on their edges, cast-iron bars (H), two inches wide, and three quarters of an inch thick, to support a layer of small wood, bushes and leaves (I), over which is laid the soil for the plants (K). Just below the level of the bars all round the dung-chamber, are holes (F), passing in a sloping direction through part of the wall into a cavity (G) in the upper part of the wall at the back front and both ends of the pit. In the exterior part of the back wall, are holes with plugs (L), to let out the steam and heat at discretion.