Feb.] THE HOT-HOUSE. I73 
sulphur, and the house shut up an hour or two to keep in the steam. 
But in cas-3 there are vines, or other plants, growing in the Hot- 
house, this last operation must be omitted. 
If the above work cannot be done in one and the same day, the 
pine plants may with great safety be set in a dry airy place for a day 
or two, provided they are not put into heaps, which would greatly 
damage them in a short time. 
The mould intended for the pine plants at the first potting, should 
be light and fine: And I would recommend that the pots be small 
in proportion to the size of the plants, that each plant may be what 
Gardeners term underpotted; they will strike root both sooner 
and better than if put into larger pots, and at their next shifting 
they will go into proper-sized pots, with their balls and roots 
entire. 
After the pine plants are replaced in the Hot-house, it will be 
proper to shade the glasses in the middle of the day, whenever the 
weather is warm and clear. The house should be constantly kept 
to a great degree of heat, which will be the means of making the 
plants strike sooner and stronger; it being evident that-they cannot 
draw themselves weak while in an inactive state: However, as soon 
as the plants are perceived to grow, it will be necessary to give them 
by degrees a greater quantity of air. 
Great care should be taken to prevent the roots of the plants from 
being injured by an over-heat of the tan, which may be done by 
raising the pots, in case the tan should heat violently. 
Other Insects found in Hot-houses, with the methods of destroying 
them. 
Besides the different species of insects, which are found so perni- 
cious to the Pine-apple plants, there are other kinds that infest most 
stoves, which frequently prove very troublesome; and although 
they are not injurious to the Pine-apple, are yet very prejudicial to 
most other plants kept there, either for use or ornament. 
1. The Aphis. This insect is of the order Hemiptera. Charac- 
ters. Rostrum bent inwards. Antennae, setaceous and longer than 
the thorax. Wings, four on the males; females none. Feet six. 
They have generally two little horns or hairs, placed on the hinder 
part of their abdomen. 
Roses, and various other plants, are very subject to be overrun 
with these insects, and if no means are used to extirpate them, they 
will in a short time, take such entire possession of the plants, that 
every part of the young wood will appear to be covered with them. 
They are commonly called lice. Many kinds of flowers and exotic 
plants which are kept in stoves, are very subject to be annoyed with 
them. 
These are easily destroyed three ways. 1. By fumigating the 
house with tobacco 2. By dusting the infected plants with fine 
snuff or tobacco dust. 3. By a decoction or infusion of tobacco. 
2. The Acarus, commonly called the Red Spider. This is of 
the order Aptera. Characters. Eyes placed on the sides of the 
