tances will completely answer the purposes on one 

 side : the notches are to be cut in the shape of a V, 

 two inches deep and three inches wide at the top, 

 which will give room for the shutters to move back- 

 wards and forwards, without difficulty, or danger of 

 slipping out. 



Both sides are thus to be provided with stakes and 

 shutters ; the upper edge of the latter should meet 

 over the centre of the platform, when the plants re- 

 quire to be covered with them, in the form of the 

 ridge or roof of a house, well fitted, and sloping 

 equally on both sides, so as to throw off rain, with- 

 out even admitting it to drip through upon the 

 plants in any part. 



It is necessary that a rail, or row of stakes, of a 

 proper height and length, should proceed from the 

 ground between the two middle rows of pots, to sup- 

 port the shutters when closed or closing, especially 

 as it is usually more convenient to begin to cover or 

 uncover on one side first, and finish on the other : 

 without a support of this kind, in such case, the 

 shutters must fall down upon the plants : a similar 

 exterior rail, or row of stakes, is necessary on each 

 side, to support the shutters when open, with the 

 same degree of slope, in a contrary direction, than 

 when closed ; by which means the plants will have a 

 free communication with the air, whether covered or 

 open ; nor are they entirely deprived of light when 



