188 CARNATIONS. 
for five minutes, turning them upfide 
down on the path, in order to air them, 
and replacing them again over the plants; 
even this will be of great fervice, though 
not equal to a more effe&ual airing at 
favourable times, which, indeed, becomes 
more frequently neceffary in proportion 
to the length of time the pipings have 
been upon the bed : but when once they 
begin to ftrike fibre, they will foon fpindle 
up and become extremely weak, if not 
carefully attended to, agreeable to the 
following direftions, viz . when their fibres 
are formed, which the additional verdure 
and growth of the plants will demonftrate, 
the glafles fhould be placed over them 
very lightly, in order that more air may 
be admitted ; and when they become 
tolerably well rooted, the glafles being 
no longer neceffary, fhould be entirely 
taken away: but it feldom happens that 
all 
