152 THE ORCHID REVIEW. 
individual requirements may in most instances be quickly acquired by 
reading up the subject. Those preferring most light should be suspended ; 
those requiring shade should be the furthest away from the glass ; and those 
preferring a moist or dry position should be catered for accordingly. We 
will now pass on to the cool Orchids, which are also a large family, but not 
nearly so numerous as the first named. The treatment of these differs 
during summer only. They come from altitudes where the conditions of 
summer and winter vary but little, therefore during summer it is necessary 
for us to keep the house in which they grow as cold as possible, as the 
hottest part of our English summer is really too hot for them, and it is 
necessary therefore to shade heavily, to ventilate freely, and to damp down 
copiously, in order to prevent the atmosphere from becoming very dry. Do 
not make use of the top ventilators too freely during very dry or windy 
weather, or the moisture escapes too rapidly. A good way to ventilate is to 
set wide open the doors or to open the side ventilators, as you then get a 
good steady circulation of fresh air instead of a winnowing, drying draught. 
Syringing overhead may be performed during hot, dry weather, but 
generally I do not recommend it, as the plants do not appear to be 
benefited by the practice nearly so much as those belonging to the warmer 
section. This cool Orchid house may be a structure of almost any size or 
shape, so long as the above conditions are maintained, and the particular 
species that are best cultivated therein may now be mentioned. 
In the first place we have nearly the whole of the large genus Odonto- 
glossum, including, of course, that popular and beautiful species, O. crispum, 
and, indeed, almost the entire genus, with the exceptions of those previously 
mentioned as being partial to a slightly warmer temperature during the 
time they are forming new growth. Too much importance need not, how- 
ever, be attached to this ; for I have lately seen during my journeys some 
wonderfully fine examples of good culture of cool and intermediate Odonto- 
glossums growing all together in one house. Again, a large number of 
Oncidiums do well here, as O. crispum, O. cucullatum, O. dasytyle, O. 
Forbesii, O. incurvum, O. Marshallianum, O. tigrinum, O. unguiculatum, 
O. varicosum, and others. Most of the Masdevallias will also grow best 
here; also the whole of the Anguloas, the Cochliodas, the Cymbidiums, the 
pretty little Sophronitis grandiflora, and several of the Epidendrums, 
including the brilliant and well-known E. vitellinum. The whole of the 
above prefer the conditions of the coolest house better than any other. 
A third class of Orchids is generally known as ‘“‘ East Indian House 
Orchids,” and this house in simply what is knwn in gardens as the ‘‘ Stove.” 
All having such a house, with facilities for maintaining a good degree of 
warmth at all times of the year, can hope to grow East Indian Orchids with 
success. The ee —- So eaig must be mentioned here, with 
