The Hot-Bed and Cold-Frame 



the hot-bed are transplanted when they have 

 attained some size. This frame should also be 

 fitted with a covering of sash. This should be 

 lifted on all pleasant days, to give the plants 

 inside the benefit of fresh air, and thus -harden 

 them for the time when they must go into the 

 ground outside. At night and on all cold days 

 the sash must be closed to retain the necessary 

 degree of warmth. A little chilly weather will 

 often injure the plants quite as much as a touch 

 of frost would. 



In sunny weather be sure to open the cold- 

 frame before the heat of the sun, by 'concen- 

 tration on the glass becomes too intense for 

 the young plants. The admission of fresh air 

 will counteract all danger from this source. 



The temperature in the cold-frame ought 

 to range between 60 and 65 if one would 

 grow strong and healthy plants, and of course 

 one wants to grow nothing else. 



It will readily be understood from what has 

 been said that both hot-bed and cold-frame 

 will require considerable attention. They can- 

 not be expected to take care of themselves 

 after being built. They must be regulated 

 according to the weather. Air must be ad- 



73 



