4 FRUIT TREES IN POTS [ch. i 



The front and side ventilators are 18 ins. wide, 

 and are made with three 6-in. x |-in. match-boards, 

 which undoubtedly are the best. These ventilators 

 should always open downwards, as by so doing all 

 cold currents of air are avoided. 



There should be a panel door at each end of 

 the house, of the following dimensions : height, 

 7 ft. ; width, 3 ft. ; wood, 1^ in. in thickness. 



There are three top ^'entilators on the south 

 side and two on the north side. (See bird's-eye 

 view of plan No. 5. ) 



I am a great advocate for top ventilation ; and 

 should prefer top ventilators, running alternately 

 the whole length of the house. 



The rafters of the house are 20 ins. apart, and 

 the best-sized squares of glass are those 20 ins. x 

 15 ins. The best glass to use is the 21-oz., and the 

 best kind of glazing is the single glazing, viz. a bed 

 of putty at the bottom only, and no top putty, as 

 each square of glass can be made secure by small 

 brads being driven into the rafters. 



The columns referred to in plan should each 

 have a flange screwed on to the bottom about 6 ins. 

 in diameter, and should be sunk into the ground 

 about 9 or 12 ins. 



It is a good plan to set them on two bricks, and 

 then fill in with cement or concrete. 



These columns will then have to be affixed to 



