FERN CULTURE UNDER GLASSES II7 



sort or another. Ferns in glass houses as- 

 suredly cannot "throw stones." Sooner or 

 later a destroyer starts in. 



The green aphis and common scale (Leca- 

 nium) must be subjected to tobacco fumes, 

 hand picking and whale-oil soap. These are 

 the common pests of home-grown ferns 

 whether under glass or not. Others seem- 

 ingly indigenous are no doubt imported. 

 Only constant vigilance and wary devices 

 can outwit the snail. Another reprobate 

 equally destructive is the so-called "thousand- 

 legged worm." The lightning-like rapidity 

 of this nuisance makes a chase useless. 

 Watch for him with a pair of open scissors 

 and snip near the head. 



FERN GROTTOES 



One of the most expensive and elaborate 

 artificial fern grottoes in the United States 

 is at Philadelphia, Pa. In this wonderful 

 dell the owner has succeeded in getting to- 

 gether over five hundred species and varie- 



