16 



THE GREEN-HOUSE. 



Ficx. 7. 



The form of a green-house is, to a certain extent, 

 influenced by the circumstance of its requiring to be 

 heated by art. That form which has the ends and 

 roof opaque, is unquestionably more easily heated 

 than any other; but then there is so great a deficiency 

 of light, as to render such a house of no use in the 



