THE PINE APPLE. 89 



plants. The fruiting-pit to be placed in the centre, 

 and the other two, right and left ; forming a range 

 of a hundred feet in length ; which would give 

 Pine Apples enough for a large family. 



" The fruiting-pit to be forty feet long, and ten 

 feet wide, over walls ; and each of the others to be 

 thirty feet long, and nine feet wide, also over walls. 

 The breast- wall of the whole to be on a line, and to 

 be eighteen inches above ground. The back-wall 

 of the centre one to be five feet, and of the others, 

 to be four and a half feet higher than the front. 

 The front and end flues to be separated from the 

 bark-bed by a three-inch cavity, and the back flues 

 to be raised above its level. 



" The furnaces may either be placed in front, or 

 at the back, according to conveniency ; but the 

 strength of the heat should be first exhausted in 

 front, and should return in the back-flues. The 

 fruiting-pit would require two small furnaces, in 

 order to diffuse the heat regularly, and keep up a 

 proper temperature in winter ; one to be placed at 

 each end ; and either to play, first in front, and 

 return in the back ; but the flues to be above, and 

 not alongside of one another ; as in that latter way 

 they would take up too much room. The under 

 one to be considered merely as an auxiliary flue, as 

 it would only be wanted occasionally. 



" None of these flues need be more than five or 

 six inches wide, and nine or ten deep. Nor need the 

 furnaces be so large by a third, or a fourth part, as 

 those for large forcing-houses ; because there should 



