188 



FIXED STRUCTURES FOR GROWING 



scale, we should recommend the ridge and furrow construction, a3 

 from the ease with which the roof may be partially or wholly con- 

 cealed, it is the most easily rendered architectural. 



Fig. 154. 



Lean-to cool-house. 



The orangery is an architectural building, more like a living- 

 room than a plant-structure, with large windows and narrow piers in 

 front and at the ends, and with an opaque roof. It is used for pre- 

 serving orange-trees and other large plants which are in a dormant 

 state during winter ; and the power of heating is about the same as 

 that for the greenhouse ; but, from the roof being opaque, less extent 

 of flue or hot- water pipe is required. Plant-structures of this descrip- 

 tion are chiefly wanted in large establishments 5 but as architectural 

 appendages to a house they may sometimes be advantageously intro- 

 duced in small villas, the area of the orangery being used in the 

 summer time, when the orange-trees and other plants usually kept in 

 it are set in the open garden, as a place for prolonging the beauty of 

 plants in bloom, and for other purposes. Such houses are now but 

 little used, as it is found that the perfect development of the orange 

 requires all the light that can be secured for it in our climate. Still, 

 where large orange-trees are grown in boxes out of doors in summer, 

 as at Holland House, Kensington, and other places, such houses may 

 prove useful winter dormitories the object in such cases being 

 simply to keep the plants at rest till the following season. 



The conservatory differs from the orangery and the greenhouse 



