and of a Boiler for an early Forcing Stove. 349 



linings into the steam flue ; d, cast-iron pipes, 3 in. in diameter, 

 conducting the water from the gutter into the drain ; tending, 

 also, to strengthen the front wall and support the coping, by being 

 placed under every third rafter ; e e, tile covers to the steam 

 flues, with brass plugs, like those used in leaden water-troughs, 

 2 ft. apart ; f, ground level ; g, coping of the front wall, which 

 serves also as a gutter. This groove, or gutter, need not be large, 

 as the column of water cannot be great collected from a light 

 and a half, the receivers being placed under every third rafter. 



The cast-iron pipes introduced here, to connect the steam 

 flues, are intended also to support planks 3 in. thick, closely 

 fitted together, which are to be used in summer, as a walking 

 way, and to hide the then almost useless lining pits : but I 

 would by no means use them in winter, as it would prove 

 injurious, by causing the condensed steam to drip upon the lin- 

 ings, thereby rendering it too wet for proper fermentation ; be- 

 sides, the linings, in winter, ought to be made up as high as the 

 bottom of the coping-stone, to prevent the weather from acting 

 upon any part of the walls of the pit ; not to mention the unne- 

 cessary waste there would be of the planks by being rotted by 

 the steam from the linings. 



Where pits are placed so near each other that a lining can be 

 made to act upon the back of one, and upon the front of the 

 other, great benefit would be derived by having these connecting 

 pipes and stoppers ; since, by shutting one series and opening the 

 other, the steam might be conducted into other pipes at pleasure. 

 For example, the steam that would destroy the crop in the early 

 cucumber or melon pit, might be conducted into the early fruit- 

 ing pine pit, where the long-bearded (long-scaled) and hide- 

 bound appearance of the winter swelled fruits, and the thirsty 

 looJk of the half-succulent leaves, show that they are famishing 

 under a high and dry temperature, for want of congenial atmo- 

 spheric food. 



The pit above described, when erected here (which I have no 

 doubt it will soon be), if constructed of neat cast-iron rafters, 

 and good sashes, made of the best yellow deal, with a couple of 

 cast-iron hot-water pipes, 3 in. in diameter, over the steam flue in 

 front, will be found to surpass any structure of the kind already 

 in our gardens. 



For a hot-water apparatus, I would recommend one of that 

 description erected by Mr. Fowler of Temple Bar. Having 

 worked several apparatus erected by persons eminent in the ad- 

 vertising column, I should prefer this, as being preeminent in 

 symmetry and simplicity. 



Fig. 112. is a section of a boiler erected here by Mr. Fowler, 

 for an early forcing stove, having three rows of pipes all round : 

 a a show the fireplace ; b, the grating ; c c, arched flues over the 



