124 THE ORCHID REVIEW. [APRIL, 1915. 
HE days will now be lengthening nicely, and more ventilation can be 
% given, as the sun will have greater power and run up the temperature. 
In fact, abundance of fresh air is needed by Orchids at all times to promote 
vigour and induce formation of healthy roots, which are the precursors of 
‘good flowers, and although it is not always possible in winter to admit air 
to the extent we should like, yet from now onwards it should be easily 
managed, especially if a little fire heat is maintained in the pipes. It isa 
bad practice at this season to save a fire by closing the ventilators early in 
the afternoons, and yet this is a common failing with many amateurs. If, 
however, a gentle warmth be kept in the pipes, the bottom ventilators well 
opened, and on favourable occasions a little air be given through the tdp 
ventilators, the plants will grow like weeds. If the weather prove sunny, 
damping down may be practised somewhat more thoroughly than advised 
last month, especially in the middle of the day. 
Towards the middle of this month shading will be required for a few 
hours during the middle of the day, but should yet only be employed if the 
sun is strong. Obviously the system of shading by blinds is imperative to 
success, and whether constructed of thin wooden lathes or tiffany, it does 
not much matter. They must not, however, be made to unroll flat upon 
the roof glass, as this tends to keep the glass very hot, especially later in 
the season. The blinds should be so constructed that at least two inches 
of space is allowed between them and the roof glass, which will allow of a 
free current of air to pass between each. If any amateur has not his 
blinds so arranged, he should have them altered now, as it will be of 
untold benefit to the plants, and any horticultural builder can affix them 
running on T-iron runners at little cost. 
The average temperatures can be higher than prescribed for last month, 
60°-65° Fahr. by night and 65°-75° Fahr, by day, with sun heat, being 
found very suitable. 
CaTTLEvYa TRIAN#.—This very beautiful Orchid js now flowering in 
most houses, and should be in every amateur’s collection. Where any 
plants are in sheath, it is imperative to give them good light and always 
sufficient water to keep the compost damp, but yet not sodden. If possible, 
remove any plants that are in full flower to a cooler house, where they will 
keep longer in beauty. After the blossoms have faded, the plants must, if 
they are to be expected to keep in full vigour, be placed at the coolest end 
of the house to rest, giving only a little water until fresh roots and leads 
begin to make their appearance. 
THE AMATEUR’S COLLECTION. 
By C. ALWYN HarRISON. 
