THE GRAPE VINE. 



97 



It frequently ocours that vineries have to be erected 

 against existing garden-walls ; and in cases where these 

 walls are too low to give the proper pitch to the roof, a 

 good plan is to raise them with muUions and sashes, 

 corresponding exactly ■wit'h the front ventilating lights, 

 the only difference being that the back lights are hinged 

 at the bottom, and open from the top oiitwards. Fig. 8 



Fio. 8. 



represents this method of both elevating and ventilating. 

 The roof can, in this case, be constructed of sashes in 

 one length, and be fixed. An overhanging coping to the 

 back provides for wet-weather ventilation, by allowing 

 the sash to open outward to a certain extent without 

 letting wet in. Of course, this method of ventilation is 

 not to be recommended for early forcing, as the opening 



G 



