Although by no means inclined to encourage this artificial practice, as fruit thus raised is neither sa-voury nor wholesome, yet we shall insert the method generally adopt-. ed to effect that purpose, for the gratification of the curious, more than for its real utility. ,
A wall should be erected 10 feet in height; a border marked out on its south-side, about 4 feet wide : and stakes fastened into the ground along the edge of the. border, at the distance of 4 inches. These are intended for the support of the glass lights (or, with less expence, frames covered with oiled paper), which are to be placed in a sloping direction towards the wall, to shelter the fruit, as occasion may require : at each end, a door is to be so constructed that it may be open-ed either way, according to the course of the wind. The frame ought to be moveable ; because, after a tree has been covered one year, the former should be removed to another; observing that each fruit-tree be forced only once, in three years: by this arrangement, they will be more durable and productive.
Previously to applying the dung to the wall, it should be thrown together in a heap, for rive or six days, that it may thoroughly fer-ment; thus prepared, it ought to be laid four feet thick at the base of the wall; and continued upwards in a sloping direction, till it is about two feet in thickness, within a few-inches from the top of the wall ; but, as it sinks, more dung should be added, for the first heat will only swell the blossom-buds. The proper season for laying it, is about the latter end of November; and, for ripening cherries, three changes of dung will be sufficient to produce very fine fruit in the month of February. - This method of forcing, however, being often very ex-pensive and troublesome, tanner's-waste is now almost universally employed for producing artificial heat, by enclosing it to the depth of three or four feet, Within the walls of a hot-house.
Early and late ripening fruit* should never be placed together; because the requisite degree of heat for forcing the latter, would be very prejudicial to the former, after have produced fruit. Glass, or oiled paper frames, are of considerable service for covering trees ; but they should occasionally be removed, to admit the benefit of gentle showers; and the doors at the ends may, in warm weather, either be left entirely open, or one of them only Closed. A mat should be suspended before the doors, to protect the trees from night frosts.
The fruit-trees most proper for this management are, the avant, or small white nutmeg, the Albemarle, the early Newington, and the brown nutmeg-peaches; Mr. Fairchild's early, the elrugo, and Newington nectarines; the masculine apricot ; and the May-duke and May-cherry. - With respect to vines, the whi e and b:ack sweet-water grapes will thrive most favourably: for early gooseberries, the Dutch-white, the Dutch early green, and the walnut-gooseberry, are the best sorts; and for currants, the. large Dutch-while, as well as the red currants, are equally prosperous. - See Hot-houses.