

102 



VEGETABLE GARDENING 



desired to replace soil or manure. Ventilation is provided 

 for by fastening one or more sashes with hinges at the 

 bottom so they may be raised as high as necessary at the top. 

 "Many kinds of building material may be used in the 

 construction of the wall, beds, etc. Lumber is used in the 

 building shown in the figure, but brick or stone would be 

 more durable, though it would add considerably to the first 

 cost. The posts are three feet apart, extend about two 

 feet below the planks, and are braced. The inside rows of 

 posts need not be quite as strong as the outside ones, and 

 need not be braced. When a house is not more than twenty- 

 four feet long it will not be necessary to support the roof 



in more than one place. 

 This is done by extend- 

 ing two of the middle 

 posts to the rafters. 



"In Fig. 38 is shown 

 a cross section of this 

 greenhouse and the way 

 the sashes and rafters 

 are joined at top and 

 bottom. The sashes are 

 cut so as to fit tightly 

 at the top and the plate 

 is beveled a little so as 

 to allow water to run 

 off quickly. 



"There are sixteen 

 wood shutters for cover- 

 These are made the same 

 One cleat is put 



3<?. in. 



Fig. 39. 



Cross section of lean-to green- 

 house hotbed. 



ing the sashes on cold nights. 



width as the sashes but six inches longer. 



on the upper side at one end, and the other on the lower 



side at the other end. When put on, the upper cleat is 



