DESCRIPTION OF HOTHOUSES. 137 



to slide upon the rafters and frame-work, the 

 same as in the former south -fronting hot-house ; 

 both ends may be also formed of glass-work, 

 which makes the structure look more uni- 

 form, or if preferred, the north end may be 

 made of brick-work ; in the latter case, the fire- 

 place may be made there, and covered in, but 

 the forming of fire-places for a house built after 

 this plan, the situation, and circumstances, must 

 guide the judgment : the bark-pit to be extended 

 along the centre of the house, with the flues or 

 pipes along the inside of the walls, or if the 

 house is of sufficient width, two pits can be 

 made, and the flue or pipe run between the pits. 

 Some approve of this form of pinery in prefer- 

 ence to the first-named, contending, that it re- 

 ceives more effectual benefit from the sun ; but 

 in this opinion I do not altogether agree, as I 

 never could perceive that it had that effect, neither 

 do I consider that it comprises any other parti- 

 cular advantage to cause it to be preferred to a 

 hothouse facing the south; and in winter I should 

 say, on the contrary, as the sun at that season 

 has less effect within, than when the sloping 



