THE ORCHID REVIEW. 369 
CALENDAR OF OPERATIONS FOR OCTOBER. 
By H. A. BURBERRY, King’s Heath, Birmingham. 
A LITTLE difference must now, of course, be made in the temperatures of 
the various departments. The following figures will be a guide to the 
degree of warmth most suitable for the autumn months :— 
CooL HOUSE :—Day, with sun, 60° to 65°; without sun, 55° to 60°; 
night and morning, 50° to 55°. 
INTERMEDIATE HOUSE :—Day, with sun, 70° to 75°; without sun, 60° 
to 65°; night, 60°; morning, 55° to 60°. 
WarRM OR EasT INDIAN HOUSE :—Day, with sun, 75° to 80°; without 
sun, 70°; night, 65°; morning, 60°. 
The beautiful weather of September has fully compensated for the late 
spring. It has assisted those plants that were rather late to form their 
pseudobulbs, and to become properly ripened, while the large volumes of 
beautiful warm air, which it has been possible to administer, have done 
much to harden and ripen up all others, giving them a healthy tone, and 
thus preparing them to pass more successfully through the winter months, 
now so close upon us. 
A few words here on the general present management of the various 
departments may, perhaps, be of service. Commencing with the Cool 
house, I may say that very little warmth from the pipes will yet be 
required. On a particularly cold, sunless day, a little may be employed 
with advantage, because it will enable a circulation of fresh air to be still 
maintained. The nights, however, are now getting long and cold, and it 
it therefore advisable to employ a little warmth for a few hours almost 
every night, or a nasty mildew will probably appear on the foliage, showing 
plainly enough that the air becomes stagnant. A little warmth in the 
pipes will prevent all this, because a goodly supply of air may then be 
given, both at top and bottom. The value of such air at this season for 
Cool Orchids must never be lost sight of. The more hardily—in reason, of 
course—one treats his Orchids, the less are his failures, and the greater 
and more wonderful are his successes. 
Regarding water in this department at this season, we must now be 
rather careful. The number of times one may damp down the surround- 
ings depends, of course, on two things—firstly, the weather, and secondly, 
the structure and its position. A well-appointed Cool house should now 
require damping down about once a day—during the morning—though 
sometimes it may require it twice; and there may frequently be days 
when it would be best to avoid damping altogether. I allude to damp, 
sunless weather. As to watering at the roots, much more care must now 
be exercised. Many cool Orchids are ruined during the winter simply 
