52 BRITISH MODES OF CULTIVATING 



He describes a Pine-stove to be heated by steam* 

 in which the vapour is admitted to a brick vault, 

 over which is -the bed of tan or earth ; this is sur- 

 rounded by a path and smoke-flues, exactly as in 

 the common form of hot-house. 



He also gives a plan of a furnace for burning 

 lime as well as heating hot-houses, as erected at 

 Billing, in Northamptonshire, and at Lady E. 

 Ponsonby's, at Bishop's Court, in Ireland; and, 

 subsequently, at various other places in that couiv 



try. 



8 



V 



In these kiln-furnaces -, (fig. 8.) the heat, after 

 passing through the limestone in the kiln or cruci- 

 ble ( a ), enters the flue ( e \ and passes through it 

 in the usual manner. The grate on which the fuel 

 burns ( d ) is contrived to draw out by means of a 

 grooved frame ( c ), as soon as the lime in the cru- 

 cible is burned, which then falls into the ash- 

 pit (&), and is removed. 



