FOR 



F, O R 



upright glass-wurk, head high, ranging immedi- heat, the frame ma) be constructed either of 

 ateiy along the front, and from the top of which wood or brick-work, and fronted, &c. with 

 a glass roof is carried to the top of the back sashes of glass as the former ; the length ma)' he 

 or main wall: when wrought by dung-heat, it ten, twenty, or thirty feet, or more ; eight or ten 

 is chiefly applied against the outside of the back wide, and six or eight high ; and, like the dung- 

 wall, and by being formed into a bed internally : heat frame, be six or eight feet high behind, and 

 when by bark-heat, by forming it into a bed in a one in front, the ends conformable and sloping, 

 pit within-side; and when by fire-heat, by having having glass-work frames raised from the front, 

 several returns of flues against the inside of the sloping either quite to the top of the hack wall, 

 back wall, and that of the front and both ends, or inclined only about one half towards thai part, 

 for the heat to pass along, constructed ac- meeting a tiled roof at top half way, which 

 cording to the sorts of plants chiefly intended should be raised high enough in front to throw 

 to be forced, and the nature of the materials to the water off behind, as well as to admit as much 

 be employed in producing the heat. sun as possible to every part of the frame : it 



Where the first kind of material is employed may likewise be constructed with an upright 

 in affording heat, the frame is usually formed front of glass, head high, and a sloping roof of 

 with an upright back and ends of deal planking, glass-work, ranging from the upright frontto the 

 and a sloping front of moveable glass-lights; the top of the back wall, which is the most eligible 

 length may be ten, twenty, or thirty feet, or more; form, both for convenience and benefit of the" 

 the width, from three to five (or more), and five or plants; either of which constru'etions may be 

 six high ; theframe work should be of inch-and- erected detached, or against a south wall already 

 half deal planking, tongued, and closely joined, built, which will serve for the back, and save 

 that no steam from the dung may penetrate into some expense ; the ends may either be of wood 

 theframe; raised five, six, or seven feet high be- cr brick, and should be glazed like the front, 

 hind, and only ten or twelve inches high in front, &c. and the glass-work in every part be made to 

 raising both ends answerable to the front and back; move on and off, as well as to slide backward and. 

 the glass-work to range, from the upright in forward to give air, and perform other necessary 

 front, sloping upward towards the back wall, to work. Atoneend,neartheback wall, adoorshould 

 about a foot width at top, there resting the ends bemadetoenter occasionally at, and within-side a 

 upon proper frame-work of wood ; and bars or pit formed for the bark-bed, three feet deep, 

 bearers, three inches in width, ranged sloping from part sunk, the greater part raised, continued the 

 the back to front, for the support of the lights, whole length and width, except about a foot and 

 as in common hot-bed frames, and the top of all half alley to pass in to perform the necessary 

 boarded wind and water tight; having sometimes culture, as well as view and gather the produce 

 within-side two or three ranges of narrow shelves of the different plants. 



along the back and ends, for pots of small plant9, The pit within is to be filled with new tan in 

 and the bottom levelled, on which to place pots order to afford a proper heat for the growth and 

 of larger kinds ; or shelves may be made rising support of the plants that are to be cultivated. 

 one behind another quite from the front halfway See Hot-Bed. 



up the back wall, in order to place the lowest Where fire-heat is to be employed, the frame 

 plants in front, the others in order behind must be formed of brick-woik, at least the back 

 them, rising gradually to the tallest in the or main wall, for the convenience of having fire- 

 back rows. flues, and the whole front, &c. be glass like the 

 In working these frames ; after having placed other sorts ; the length may be from twenty to 

 the pots of plants in regular order, the lights are forty or fifty feet, or more, though one fire will 

 put on, and a sufficient quantity of fresh hot not warm more than that length; the width from 

 stable-dung, prepared as for common dung hot- five or six to twelve or fifteen feet, and eight or ten 

 beds, is to be piled up close against the outside high. In this case the fire is burned in a furnace 

 of the back and ends, a yard wide at bottom, behind at one end or middle, thence corn- 

 drawing it gradually into a foot width at top, fi- municating the heat by internal flues or funnels 

 nishing it somewhat sloping, to throw off wet; running the whole length of the back wall in 

 and as the dung settles or sinks down, a fresh three or four returns one above another, and 

 supply must be added at top, to maintain the continued in one or two flues in the front, 

 lining to the full height of the frame, additions And frames thus constructed may be con- 

 being occasionally made of fresh dung as the trived either of moderate width for one row' 

 heat -declines ; by this means a fine growing of trees only, to range against the back wall, 

 heat will be thrown in. See Hot-Bed. or may be capacious enough to have a range 

 Where bark is made use of in producing of trained wall- trees behind, and some small 



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