300 THE ORCHID REVIEW. [Octorer, 199). 
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ably. The temperatures of the various houses should be about the follow 
ing, modified according to outside conditions :-— : 
Rising with Without 
fo 
4 
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i 
Night. Morning. sunheatto sunheat. 
Stove ... cut To. 68° go° 75° 
Cattleya a 68° 65° 85° 70° 
Intermediate ... 62° bo". 85° 68°. 
Odontoglossum ... . 55° 53° 70° 60° 
In each case do not dispense with bottom air, but when necessary 
increase the amount of heat in the pipes to counterbalance the effect of 
the cold air. In the Odontoglossum house try to leave some air on both 
top and bottom as long as possible. Whenever the outside temperature is 
not below 50°, it is quite safe to leave the top ventilators open a little © 
all night during the early part of the month, for the growths make great 
strides at this season, especially when the outside conditions allow of 
plenty of fresh air being admitted. a 
CLEANING Housks, &c.—This is perhaps the most important work for 
this month, and should be taken in hand as soon as possible, so that full 
light can reach the plants whenever it is desirable. This work takes a col 
siderable time, and unless started early some of the houses do not get the 
benefit of clear light till-late in the year. As far as possible I like to 
start on the houses that contain plants that prefer a good strong light at 
this season, washing the inside of the glass roof first, and then, as soon as 
we are sure that no further shading will be required, wash the outsides 
too. The houses themselves should next be taken, according to the plants 
they contain, leaving the Odontoglossum house to the last. When the 
houses are being washed thoroughly examine each plant also, seeing that 
all labels are sound and marks quite clear, and staking any growths 
that need it. Each plant should be sponged, even if no insect pest OF 
filth is in evidence, as a wipe over, when carefully done, will prove very 
beneficial, and will make the plants present a clean and well-kept appe™ 
ance. Few things are more gratifying to a grower than to see a house We 
arranged, and after the structure, plants, stages, and pots have been wel 
cleaned, after having each individual in his hand, he feels easy in his mind 
that there is nothing amiss with any plant that he does not know about. 
Most evils when known can be met and cured. __ It is when they are thet 
undetected that they so frequently prove fatal, and cute observation ® * 
fine virtue for an Orchidist to cultivate. a 
The cleaning and keeping Orchids clean is now reduced to a minimum 
‘compared with what it was a few years ago, before we had so many sim He 
and safe preventatives to aid.us. Periodical spraying and fumigating W" 
practically keep all Orchids free of insects, saving the grower much basi 
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