AURICULA. 
127 
It is neceflary that a rail, or row of 
flakes, of a proper height and ftrength, 
fhould proceed from the ground between 
the two middle rows of pots, to fupport the 
\ 
fhutters when clofed or doling, efpecially 
as it is ufually more convenient to begin 
to cover or uncover on one fide firft, 
and finifh on the other; without a fup¬ 
port of this kind, in fuch cafe, the 
fhutters muft fall down upon the 
plants : a fimilar, exterior rail, or row 
of flakes, is neceflary on each fide, 
to fupport the fhutters when open, 
with the fame degree of flope, in a 
• < 
contrary dire&ion than when clofed ; 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 the fhutters are 
clofed, becaufe the lower edge of the 
ftiutters is as high or higher than the 
top 
