8 THE FORCING GARDEN. 



months : these are most essential in early forcing. 

 I propose that the bars for this root protection for 

 vine borders should be fixed from the front wall 20 

 inches apart, and then glazed on my own plan without 

 side laps or putty. (See illustration.) 



As soon as the month of May comes, take the glass 

 off and put it into boxes till it is wanted again, when 

 the border will be open to all the genial influences of 

 the sun, as well as the refreshing rains of the summer 

 months. It is but a few hours' work for any good 

 ordinary man to unglaze the whole of these border 

 protectors, and to reglaze them, the ' clips ' being 

 already there. 



For those who prefer them, shifting sashes may be 

 used, which may be made to slide, as in the case of 

 ordinary frame sashes, but these will cost double the 

 expense of making. Air can be admitted by having a 

 flap shutter one foot wide all along the eaves of the 

 roof of the vinery, being made to open and shut by 

 cords from the inside, above the pipes. If the border 

 glass is arranged on my plan, this will be found to be 

 the best, there being no lattice-like cross-bars, no side 

 laps, nor so much glass as in all the other patent plans 

 of glazing. 



The ventilators in the wall, fig. 2, will, I have no 

 doubt, be found the cheapest to construct, , and the 

 most convenient to work, as they can all be opened 

 and shut at once, and that by a boy. A frame should 

 be constructed so as to fix inside each opening in the 

 wall and made to come beyond the brickwork a little, 

 just enough to form a facing for the shutter, so that 

 each one will fit sufficiently close to exclude the air 

 and to prevent the escape of heat. The sliding shut- 



