66 ON THE GROWTH OF THE CUCUMBER, &C. 



with the top, or curb, so that no portion of the 

 brickwork may be exposed to the external air, 

 especially in early forcing. 



Should the ground surrounding the cavity be 

 such as will not stand without support, a nine- 

 inch wall, or boards, must be constructed as 

 high as the surface, to prevent its falling in. 



