12 Grape Culture. 



get an equal portion of sunlight and heat. The span-roofed 

 vinery, being, as it were, a double lean-to, should be very much 

 wider if a large crop is expected. A good width would be 

 30 feet equal to a double lean-to at 15 feet, and giving a 

 rafter with not too steep a pitch of about 19 feet. The sides 

 in this case also should be about 4 feet I foot of wall above 

 floor level, and 3 feet of glasswork framing. There should 

 be ample means of ventilation, an opening sash extending 

 continuously from end to end each side of the ridge, and, of 

 course, the bottom ventilation, as in the lean-to each side. 

 A large structure like this should have upright pillars sup- 

 porting the ridge, as the width is really too much to do without 

 unless very heavy bracing is adopted, and this is objectionable, 

 as causing obstruction to the light. A 30 feet wide vinery, 

 even for late use, should not have less than four rows of 4-inch 

 pipes each side. It must be remembered that in proportion 

 to its cubic capacity a span house is much more difficult to 

 heat than a lean-to there is not the great shelter of the back 

 wall. Drawings are given of this type of house. 



CHAPTER II. 

 DRAINAGE AND PLANS OF VINERIES. 



DRAINAGE is of the utmost importance, as vines will never 

 thrive in a stagnated border. The border must be kept sweet 

 and pure by a thorough system of drainage. If possible, 

 the bottom of the border should be concreted, which is simple 

 and inexpensive on account of cement being cheap nowadays. 

 This cement floor should have a gentle slope from the back 

 wall right to the outside border. Over this concrete place 

 9 to 12 inches of brick bats and lime rubble. Place the roughest 

 below and the finest on the top. Rough stones may be mixed 

 with the drainage. Aerated borders having drain tiles laid 

 amongst the drainage serve to warm the borders to a great 



