IMPLEMENTS AND ACCESSORIES 41 



(2) on the first notch, (3) on the second notch, and 

 (4) on the top notch. When the plants are young 

 and tender the tilt is usually placed on its side. As 

 the plants increase in size and sturdiness, however, a 

 little more air may be given, and notches i, 2, and 3 

 are utilised in turn. 



To avoid straining the framework of the lights 

 when giving air, the tilt should be placed near the 

 middle of the rail at the side, or at the top or bottom, 

 instead of being nearer to one end or to one side 

 than to the other. 



Another important point to remember is, not to 

 tilt the lights on the side facing towards the wind, 

 but on the side away from it. The wind thus passes 

 over the frames without causing a cold draught. 

 Should the lights be raised on the wrong side, the 

 wind enters freely and causes the leaves to " flag " 

 or wilt, and they may perhaps receive a check from 

 which they never recover. Besides, there is another 

 danger from raising the lights on the wrong side, viz. 

 that a strong breeze may easily lift the lights from their 

 position, and break a considerable amount of glass. 



It may be as well to mention although it is well 

 known to practical men that when plants have been 

 exposed for a week or ten days to the greatest possible 

 amount of air that can be given by the tilt standing 

 upright, they will have become so hardened off 

 that the lights themselves may be taken off altogether 

 on bright genial days. In addition to experience, 

 the state of the weather and the season will, however, 

 guide one as to whether it is safe to leave the lights 

 off during the night time or not. 



CLOCHE TILTS. It is quite as necessary at times 



