May-June, 1920.] THE ORCHID REVIEW. 75 
maintained, so as to keep the temperature at the lowest possible point. The 
ventilation of the other houses must be so arranged that the plants may 
receive at all times a continual supply of fresh air without causing draughts, 
which no plant can thrive in. The bottom ventilators may be left partially 
or wide open at night, according to circumstances, thereby providing a sweet 
and healthy atmosphere at all times. Large houses are more difficult to 
manage in this respect than those of more modest dimensions. In the 
warmer divisions, it matters little how much the rise in temperature by sun 
heat may be, provided there is sufficient ventilation to balance it. 
SHADING will now require much attention, as the blinds should only be 
let down when necessary, and this as a precaution against the foliage 
suffering from the excessive heat of the sun’s trays. Some Orchids are 
naturally shade-lovers, while others love the sun, hence the necessity of 
ascertaining the individual requirements of the respective plants, and 
arranging them accordingly. The two classes require different treatment, 
and if success is to be attained the cultivator must use all his powers of 
observation to ascertain the likes and dislikes of his plants. 
SUMMER QUARTERS.—Those plants which thrive best in a moderate 
and equable temperature the whole year round should be removed from the 
Intermediate house, where they have passed the winter, to the Ceol house, 
_where they may remain for the next few months. There are several species 
of Lelia, Dendrobium, Miltonia, Odontoglossum, Masdevallia, and other 
Orchids, which thrive under this kind of treatment. After removal, it is 
desirable to keep the plants for some little time slightly drier at the roots 
than they have been in the warmer division. 
ANGULOAs.—These, sometimes known as Cradle Orchids, will be making 
new growth, and pushing up their flower spikes. When their flowering 
period has passed they may have attention as regards repotting, should they 
be in need of it, using a well-drained compost, similar to that used for the 
green-leaved Cypripediums. When repotting, keep the base of the young 
growths on a level with the rim of the pot, and place the material quite 
firmly. _They succeed in the Cool house, or in cold districts do best in the 
cool end of the Intermediate house. 
LycasTEs succeed under similar conditions to Anguloas, and when their 
flowers have passed over any necessary repotting may have attention, using 
a similar compost. Neglect of repotting when the Compost is exhausted 
is injurious to all Orchids. 
Denprogiums.—D. Phalznopsis and D. formosum are useful autumn- 
flowering species, which should be repotted at once, if not already done. 
The best receptacles are shallow pans, and the plants thrive best suspended 
in a warm, moist structure, exposed to all the light possible, and they need 
only be shaded during the hottest part of the day. The cool growing D. 
