44 
CHRYSANTHEMUMS. 
It is a good plan to do this on two consecutive evenings, 
in case any of the insects may have recovered sufficiently 
to repeat their attacks. 
By continuing the fumigation for two nights, there is 
no doubt at all about the effectual character of this opera- 
tion. Subsequently, some two or three weeks hence, 
when the plants are in full blossom, should traces of 
green-fly and other troubles of this sort be seen in the 
flowers, again repeat the operation. 
Watering, etc. — Keep the surface soil in the pots free 
from weeds, and should this at any time assume a slime- 
like appearance, gently remove the accumulation, so that 
the proper aeration of the soil may be possible at all 
times. Continue to apply liquid manure until the blooms 
are about two-thirds developed, but on no account should 
this be given in a strong condition. It is a good plan to 
alternately water with clear water, in this way clearing 
the air passages of the soil. The water at all times 
should be as nearly as possible of the same temperature as 
that of the greenhouse itself, and this may be easily 
brought about by adding warm water to that stored for 
the purpose of watering in the ordinary way. There is 
more in this little detail than may appear on the surface, 
as chills and checks to the progress of the plants not sel- 
dom take place when this detail is ignored. 
Ventilation, Shading, etc. — Ventilate with care, always 
leaving the top ventilators open. At all times avoid 
draughts, and for this reason shut off top air on the side 
of the glass house in \Vhich the wind is blowing. Side 
ventilators also should be opened, when this may be done 
without causing draught also, regulating this according 
to the position of the wind from time to time. A free 
circulation of air among the lower portions of the plants 
is at all times desirable ; this keeping the atmospheric 
conditions in a buoyant state, and rendering the plants 
