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 

 oft", 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 

 weather; 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 day time 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 windows, 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 

 house 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 



