342 THE ORCHID REVIEW. 
CALENDAR OF OPERATIONS FOR NOVEMBER. 
By H. A. BURBERRY, Orchid Specialist, King’s Heath, Birmingham. . 
ALLOow the thermometers to register a few degrees lower than those given for 
last month. Avoid as far as possible a hot, dry, and close state of the 
atmosphere, which is detrimental to the health of the plants, and 
conducive to the free growth of thrips, red spider, and other undesirable 
pests. Distribute moisture for evaporation in strict accordance with the 
amount of fire heat used to maintain the required degree of warmth, and do 
not neglect to put on ventilation at all times when possible. 
This is the month for fogs, and Orchids which bloom at this season will 
consequently suffer more or less from their effects. I refer chiefly to 
Orchids grown in large towns, for the fogs of country places, which are 
free from smoke, and the products of combustion, are in no way injurious, 
but on the other hand are somewhat beneficial. - The evil effects of town 
fogs may be lessened considerably if the ventilators are kept tightly closed 
during the time they are on, and an abundance of moisture in the 
atmosphere maintained until it lifts. 
It is remarkable how the Cool house Orchids have responded to the 
cooler conditions of the weather since the great heat has passed away. It 
was impossible, of course, during that time to maintain conditions 
thoroughly agreeable to them, and one could only do his best to keep their 
surroundings as cool as he possibly could without unduly drawing growth 
by keeping them too dark. Now, however, things have changed, and we 
have the pseudobulbs once more assuming their usual plumpness, and the 
foliage that dark green colour which clearly denotes strength and vigour. 
Avoid excessive watering at this season. I fear that cool Orchids generally 
get overwatered during the winter months. If the plants are well rooted, 
it is remarkable what a little water is required to maintain these plants in @ 
healthy state, that is, of course, supposing that the ventilation is well 
attended to, and the hot water pipes only heated when such heat is 
required, and then sufficient only to assure the desired temperature. 
; A good many of the autumn and winter blooming Oncidiums are now 
- ape or in flower, such for instance as the old and favourite 
species, O. varicosum, O, tigrinum, O. Forbesii, O. ornithorynchum, a 
eae "lt career I generally find that if these pa 
thereto ss r they are alright in the coolest house, and may oe 
Gos. iy : rest for the remainder of the winter. But 1 oe 
than this es t a ee ee gn a a 
chance of sth as 5 ee © nemiet them on:and Be goo 
of getting the easy agate petteg pieity..00d . lanes = he 
y strain of blooming over more quickly, so that : 
