24 THE ORCHID REVIEW. 
of which we grow about 20,000, but before using “ Campbell ” they gave great 
trouble. I have often seen another pest in the form of a fungus, which 
attacks the under part of the leaves and turns them yellow, but the frequent 
use of “‘ Veitch’s Chelsea blight,” applied with a sponge, keeps it down. 
A mixture of soot and lime thrown about the house once a month, | 
have proved a great help. 
Failure in the growing of Odontoglossums in my opinion is due to over- 
watering, too much moisture in the atmosphere during cold weather, and 
not sufficient shading in summer. 
G. RopertTs. 
Arddarroch, Gareloch Head, N.B. 
apes 
CALENDAR OF OPERATIONS FOR JANUARY. 
By H. A. BuRBERRY, Highbury, Moor Green, Birmingham. 
WE have now entered upon another year, and let us hope a most successful 
one to Orchid cultivators, to the Orchid Review, to importers and collectors, 
and, in fact, to all interested in the Orchid world. f 
The temperatures should be allowed to remain as advised for last. month, 
namely :— 
THE Coot HousE.—Day, with sun, 60°; without sun, 50° to 55°; night, 
50°; morning, 45° to 50°. 
THE INTERMEDIATE Houses.—Day, with sun, 65° to 70°; without sun, 
60°; night, 58° to 60°; morning, 55° to 58°. 
THe Warm House.—Day, with sun, 70° to 75°; without sun, 65° to 70°; 
night, 60° to 65°; morning, 60°, 
Attend well to the atmospheric conditions of each department, as it is @ 
most important matter, especially at this time of year, when the outside 
conditions are often so variable. Observe that the degree of warmth 
indicated above is maintained as nearly as possible, and use these figures 
as.a guide. It is not possible, of course, to always do so exactly, nor is it 
absolutely necessary. The thermometer will fluctuate a few degrees, higher 
or lower, and this will do no harm ; in fact, it occurs in a state of nature. 
Do not let the atmosphere become too moist or stagnant, and, on the 
other hand, avoid excessive drought. When much fire heat is required, 
the air, and the plants also, are apt to become too dry if not watched, and 
the tendency counteracted by a judicious application of water to the roots 
and about the house. Generally speaking, once a day will suffice for 
damping down this month, but on certain mild damp days it will be better 
not to do so at all. Where the hygrometer is in use it should show from 
one to two degrees of evaporation in the coolest houses before damping the 
paths, and in the other departments two or three degrees. 
