118 THE ORCHID REVIEW. 
were never exposed to the full heat of the sun, but were carefully shaded 
with a fairly thick blind whenever the sunlight was considered too strong 
for the well being of the plants, no special thought being given to the 
ripening of the seed. I may say that I neither believe in the necessity of 
full sun exposure for the ripening of Orchid seed, nor in the constant use 
of thick blinds to produce perpetual shade for the same end, but in a 
rational treatment which permits either Cypripediums or other Orchids to 
enjoy as much sunlight as they can bear without injury to the leaves, 
or the stunting of their growth. 
Bridge Hall, Bury, Lancashire. O. O. WRIGLEY. 
CALENDAR OF OPERATIONS FOR APRIL. 
By H. A. BuRBERRY, Highbury, Moor Green, Birmingham. 
THE temperature of the cool house for April should be as follows: 60° by 
day ; with sun, 65°; by night, 55°; morning, 50°. These figures should be 
maintained as nearly as possible, freely admitting air through the ventilators 
in accordance with the outside conditions, and keeping a regular supply of 
moisture on the paths, stages, and other surfaces, by thoroughly damping 
down at least three times a day. But little fire-heat will now be required in 
this house, but sometimes the nights are cold, and then it is best to have 
the pipes warm in order to maintain ventilation. The repotting of Odonto- 
glossom crispum and others of the same type should now cease until early 
autumn, otherwise, as the hot weather sets in, much shrivelling of the 
pseudobulbs will occur. The repotting of other cool Orchids should be 
pushed on wherever it is necessary. Shade the plants from bright sun- 
shine. 
The temperature of the intermediate and Cattleya houses should be 65° 
by day; with sun, 70°; night, 63°; morning, 60°. The plants in these 
houses, too, should now be shaded during the day in bright weather, and 
full attention paid to ventilation, always being watchful during changeable 
and trying weather; see that the atmosphere at the same time does not. 
lack moisture ; damping down three times a day will not be too often as a 
general rule. Repot any plants before the new growth is too far advanced,. 
or the new roots get too long, which then results in an unnecessary check. 
The Mexican house should be kept at the same temperature as the last 
named, but, of course, having no shading now, and very little at any time. 
The sun runs the thermometer up to a high degree during the day in bright 
weather, and this warmth must be tempered by large quantities of air and 
‘frequent damping down. bs 
_. The East Indian and Dendrobium houses should be-kept at 73° by day. 
