THE ORCHID REVIEW, 281 
CALENDAR OF OPERATIONS FOR SEPTEMBER. 
By H. A. BURBERRY, Orchid Specialist, King’s Heath, Birmingham. 
No fire heat should be required for the Cool department this month. A 
large amount of air should be admitted, particularly during the cool, dewy 
nights, and the Odontoglossum crispum will then be found to grow ina 
remarkable manner. Water and damp pretty freely still, though much less 
moisture is demanded than for the two or three preceding months, when 
the days were longer and the atmosphere drier. 
The Intermediate and the Warm houses will now require a_ little fire 
heat regularly during the nights, and a slight amount during the day, more 
or less according to the weather, though special care should be taken not 
to use more than is absolutely required for the maintenance of the desired 
temperatures. A little heat just at present is certainly very beneficial, even 
though the thermometer may stand high enough without, because it pro- 
motes circulation and prevents an over stagnant atmosphere; and thus 
assists in the ripening of the new growths, which should now take place 
very largely among those species which have arrived at this stage. At the 
same time air should be admitted freely whenever possible, and this treat- 
ment will give the plants the hardiness and healthiness necessary to carry 
them successfully through the winter. 
Regarding the correct temperature, it is this month rather difficult to 
give any bare figures. During hot, bright weather the temperatures given for 
summer may safely be approached, but with more air anda less humid 
atmosphere, whilst at other times, and at nights, of course, a considerable 
reduction may and should take place. 
As to shading, much less is now necessary, in fact some structures may 
scarcely require any, or, if any, only for a very short period. Others, which 
are more fully exposed, may still require a good amount for the whole of 
the present month, and for some tender species, such, for instance, as 
Phalznopsis, well into next month in bright weather. 
The present month is an extremely interesting one to the enthusiastic 
Orchidist. It isa time of an important change in the lives of the plants, 
necessitating in a number of instances a vast difference in their treatment. 
The flowering period is an interesting time, but for an enthusiastic grower, 
I think that the early part of the growing season is even more so, and 
certainly a more anxious one, because by the appearance of the néw growths, 
their strength, healthiness, &c., a practised eye can pretty clearly foretell 
the results. Not less interesting, I think, is the present period, for the 
results are here, and whether good, bad, or indifferent, the treatment now 
given will have great influence, firstly on their flowering, and afterwards 
on their growth. 
