Walsh. — On Public Ferneries. 623 



the cruciform shape, surmounted by a dome at the mtersection 

 of the arms, which is usually adopted for large conservatories, 

 would probably be found most convenient and at the same 

 time most externally imposing, especially if an aisle or lean-to 

 were carried along the principal sides. By this arrangement 

 the different sizes of the plants would be accommodated by the 

 varying height of the roof, while from every part of the build- 

 ing the eye would be naturally led up to the central group. 

 The larger plants should be placed in the ground, and a system 

 of finely-perforated water-pipes carried overhead, so that a 

 shower of rain could be turned on when required. 



