TRANSACTIONS 



OF 



THE HORTICULTURAL SOCIETY- 



I. Upon the Means of giving Strength to the Stems of Plants 

 growing under Glass. By Thomas Andrew Knight* 

 Esq. F. R. S., $c. President. 



Read January 18, 1820. 



The forms of the stems of trees and shrubs which grow 

 under glass, are generally found much more slender and 

 weak than those of other plants of the same species, which 

 grow in the open air ; often to such an extent as to render 

 necessary the unsightly appendage of supports, or props ; 

 and, in many of those species, which are cultivated for orna- 

 ment only, to destroy the relative proportions requisite to 

 constitute beauty. These defects may be traced to a con- 

 currence of causes, to the shade necessarily given by the roof 

 of the house, to the injudicious application of high tempera- 

 ture at periods when light cannot be obtained, and to the too 

 close contiguity of plants to each other ; but chiefly to the 

 total absence of the motion which is naturally given by 

 winds. 



VOL. IV B 



