166 Account of a new Frame used in forcing Asparagus, fyc. 



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A B C D is a front elevation of the frame as it stands on the 

 ground before it is covered with hot dung ; E E rafters on which 

 the shutters G fall ; /./. hinges of the shutters, which may be of 

 metal or leather, or even linen ; G G shutters which are to be 

 lifted up for the purpose of examining when the Seakail is ready 

 for being cut ; H H holes six inches square cut in the rafters, 

 and having square boxes adapted to them, of which the two at the 

 ends are for the purpose of occasional ventilation, and that in the 

 middle for the examination of a thermometer that is fixed inside 

 the frame. This thermometer should have a scale made of brass, 

 for in such situations, wooden scales soon become obliterated. 



I K L M mark the ground plan, and N the section of this frame. 



This kind of frame, if judiciously managed, will be found much 

 superior to the earthenware covers that are commonly used, and also 

 more economical ; for neither is it subject to the expence of break- 

 age, nor does it consume more than one half the quantity of dung. 



When to be used, the frame is placed over a row of Seakail, and 

 sunk almost two inches in the soil, so as to keep out mice and snails. 

 It is then covered all over with about six inches of warm dung, or 

 rather more at the sides of the frame. The plants will soon be 

 stimulated into growth by the gentle warmth thus communicated ; 

 they can be watched by means of the shutters G G ; the temper- 



