72 



THE FLORAL WORLD AND GARDEN GUIDE. 



houses of a sharp pitch, as illustrated in Figs. 1 and 2, are the best 

 forms that could be adopted. A much steadier heat can be main- 

 tained in a lean-to house than in a span-roof during the winter and 

 early spring months, and late grapes keep better in them. Why 



Fig. 1. — Section of eaely or late Vinery. 



this is so could be readily explained, but it would take up more 

 space than can be well afforded, and for all practical purposes it is 

 sufficient to put on record that such is the fact. The advantages of 

 span-roofed houses over lean-to's consists in their being cheaper in 

 proportion to their capacity. For instance, the same quantity of 

 grapes may be grown in a span 'roof house fifty feet long as in a 



Fig. 2. — View of early or late Vinery. 



lean-to double that length. Supposing the length of the roof to be 

 the same in both cases, the expense of the back wall would be 

 entirely saved, as the cost of the wood-work, glass, front walls, and 

 heating apparatus would be the same for either lean-to or span. In 



