294 CULTURE OF THE GRAPE. 



his main efforts being directed in training, and in guard- 

 ing against mildew. But there are advantages in having 

 close houses, in order to obtain entire control of the 

 atmosphere, even for the summer crop. 



THE COLD GRAPERY. 



Contrary to the direction of Mr. Allen, for the position 

 of the grapery I should advise a double or span roof, the 

 ridge running as nearly as possible to the north and south. 

 Thus the sun will have its utmost effect during the morn- 

 ing and evening, while its fiercest rays will be mitigated 

 by striking obliquely upon the glass at mid-day. The 

 pitch of the roof may vary from thirty to forty- five de- 

 grees; the latter pitch, however, giving a more upright 

 position to the vines than is desirable. Fixed roofs are 

 cheaper, and also much lighter and neater, than sashes 

 with framework, and are therefore much to be preferred, 

 unless the sashes can be put to double use during the 

 winter, when the vines are at rest. The curvilinear 

 style is perhaps more graceful than the straight-line 

 roof; but one has no very material advantage over the 

 other. For the sake of a pleasing picture, houses are 

 often represented with a high elevation ; but this form is 



