FRAMES. 85 



are made in sections it is the practice to have each 

 section long enough to take five sash. Usually a 

 space of twelve or fifteen inches is left between 

 each section. In summer the sash are taken off 

 and the frames are stored where the weather 

 will not affect them. There is no particular 

 advantage in making frames in this way. 



Frames are occasionally heated by means of 

 hot water or steam pipes, and in this way the frost 

 is excluded. The ordinary practice in heating 

 with hot water is to run one one and a quarter 

 inch pipe completely around the frame. The 

 boiler is placed at a point several feet lower than 

 the frame, and the pipe from this is so run as to 

 give a slight rise to the end of the frame farthest 

 from the boiler and a slight fall from the far end 

 back to the boiler. The flow pipe is usually placed 

 against the board on the north side of the frame, 

 while the return is run along the board on the 

 south side. 



A boiler with sufficient pipe to heat a frame 

 one hundred feet long and six feet wide will cost 

 approximately fifty dollars. While there are some 

 advantages in heating frames in this way it is a 

 question whether it would not pay in the end to 

 use the boiler in heating a house made of sash, as 

 already described that is, having the sash and 

 the boiler, better results could probably be ob- 

 tained by constructing a house of sash so that 

 the plants would be accessible at all times and 



