chap. xi. *1 GREEN-HOUSE PLANTS. 353 
/ 
has become elongated, it will become hand- 
some, and what gardeners call well grown. 
Another objection to growing plants in 
rooms is the great difficulty that exists in 
keeping them clear of insects; particularly 
the Aphis or green fly, and the kind of mite, 
(Acarus tellarius) commonly called the red 
spider. These are generally destroyed by 
fumigation; and the best mode of fumigat¬ 
ing them is by Clark’s Patent Blower, with 
the fumigator attached, which has been al¬ 
ready described. Washing with a syringe 
and abundance of water is, however, pro¬ 
bably a better mode; as it has been often 
observed that neither the green fly nor the 
red spider will ever infest a plant, that is 
frequently syringed. 
The management of plants in a small green¬ 
house differs very little from that of plants in 
rooms. Whenever the weather will permit, 
air should be given if only for half an hour 
in the middle of the day. The house should 
be kept clean, and free from dead leaves; 
and the plants should not be too much 
crowded. Nothing can look worse than 
pale sickly green-house plants, drawn up 
A A 
