THE PINE APPLE. 51 



air-proof, they will heat the house better, and much 

 less fuel will serve. 



Secondly, by a due attention to keeping the in- 

 side of the roof, &c. duly painted, and by con- 

 stantly white- washing the walls and flues in every 

 part of the house, the plants will be greatly bene- 

 fited, both from having a better reflection and from 

 cleanliness. 



A further advantage in stoves newly built may 

 also here be remarked. Where tan only is used, 

 the beds are always filled at the first with new tan 

 entire ; but afterwards, constantly with new and 

 old tan intermixt. 



Lastly, it is probable that stoves, newly erected, 

 derive their greatest benefit from the good con- 

 dition of the glass-work ; for, however well it may 

 be kept in repair afterwards, it is certain that there 

 never is so much light in an old stove as was at 

 the first. Dirt will find its way into the cavities 

 between the squares, &c. which, obstructing the sun's 

 rays, darkens and gives a gloominess to the stove. 



