CTJLTUKE TJNDEE GLASS. 



249 



aid the hard, fast, and narrow lines of training needful to command a 

 TnaxinrnTTi intensity of solar inflnences in the open air may be dispensed 

 with under glass. It is, therefore, no longer needful to skeletonise a 

 peach tree over a trellis or wall in order to ripen its fruit. On the con- 

 trary, they may be grown under glass as trees of any desired form and 

 size, according to the capacity of the house. In a word, our ability to 



Pia. 57. 



create and sustain artificial climates at will enables us to grow natural 

 peach trees in England if so disposed. 



The natural desire of cultivators, however, to crowd as much bearing 

 wood as possible into a. limited area, has practically restricted peach 

 trees under glass to three general types or forms : these are standards, 

 pyramids, bushes. (See Figs. 57, 58, 59.) Of course there are endless 

 modifications of each of th^se forms, but the general types are, as a 

 matter of fact and experience, preserved in the so-called orchard houses. 



