90 THE GREEN-HOUSE. [Jan. 
their tubs or pots are regularly planted in the same manner as 
hardy plants are in the open air. This house is roofed as well as 
fronted with glass work, and instead of taking out the plants in 
summer as in the green-house, the whole of the glass roof is taken 
off", and the plants are thus exposed to the open air, and at the 
approach of autumn frosts the lights are again put on, and remain 
so till the May following. 
This building being furnished with flues, &c. may be used as a 
green-house at discretion by introducing stages instead of beds, and 
in that case the glass roof may be permanently fixed. 
Work to be done in the Green-house. 
In mild days, when the weather externally is moderate and calm, 
let the windows be opened a little for the admission of fresh air 
about ten or eleven o'clock, and about two or three in the afternoon 
let them be shut close again. But the time of opening and the 
time they should be kept so, must always be determined by the 
weatherj for there are many changes sometimes in a few hours at 
this season. The upper lights may be let down a few inches for 
the admission of fresh air as well as to let out the foul air of the 
house, even when the under lights cannot be raised with safety. 
In frosty weather the windows must be kept constantly closed, 
and if very severe, let the window shutters be shut every night, and 
even occasionally in the daytime when the frost is extremely rigor- 
ous, and no sun; or, in default of shutters, on this occasion let gar- 
den-mats be nailed up against all the v/indows, or strong canvass 
hung on rollers be let down before them, and remove the small or 
more tender plants in front, as far from danger as possible. 
Keep the plants perfectly clear from decayed leaves, and as clean 
as possible from any considerable foulness, and every part of the 
bouse clean and free from litter of fallen leaves, &c., all of which 
is essential at this time for the prosperity of the plants in general. 
When the weather is foggy or very wet, it will be proper to keep 
the windows and doors close. 
Water must be given to such plants as you see require it, but let 
that be given in very moderate quantities, and always, if possible, 
take the opportunity of a mild day, and if sunny, the better: in the 
forenoon from eleven to twelve or one o'clock, is the proper time 
of the day for watering at this season, and generally prefer soft 
water for this occasion. 
But very little water must be given at this season of the year to 
any of the aloes, sedums, or any other of the succulent plants. 
Let it likewise be observed that such of the woody exotics, as 
oranges, myrtles, geraniums, &c., as you shall see necessary to 
water, should have but a very moderate quantity given them at any 
one time. 
In such green-houses where there is the convenience of flues for 
occasional fire-heat in very rigorous weather, you should in time of 
continued severe frost, make moderate fires in an evening and 
morning, just sufficient to warm the inclosed air enough to resist 
