364 



FORCING GARDEN, 

 Fi- 42. 



in, and a single turn of a flue behind. We should pre- 

 fer the following form, in whidi there are ventilators, a 

 a, and a hot-water apparatus surrounding the whole pit. 



Fis. 43. 



The dimensions of this may^be fifty feet long, and nine 

 feet wide-; the glass being two feet and a half from the 

 curb of-the-bark-pi-t in front, and five feet behind. We 

 next present 'a section of 'a pine-pit with a curvilinear 



44. 



