OF DWARF FRUIT TREE CULTURE. 



47 



different houses, but this is not necessary if one wishes to grow a 

 variety in one house. Only in that case the different varieties should 

 be kept together "en bloc" for the sake of regulating the ventilation 

 to suit each lot. The best form of orchard house is the span roof, 

 not less than 18 feet wide and 4 feet 6 inches to the eaves, and 10 



Conference Pear Photo 

 Fig. 49 



feet to the ridge; in length 20 to 50 feet or more; ventilators 18 

 inches wide, hinged at the bottom, run along each side of the house, 

 one foot below the eaves ; and top ventilators 2 by 3 feet at intervals 

 of 5 feet, alternately, on either side of the ridge. The pots must 



