Aucust, 1903.] THE ORCHID REVIEW. 235 
the inhabitants of the Cool houses. To give plants every chance of 
deriving benefit from the cool and dewy night air, the ventilators should be 
left open on the latter houses, and those of the other houses—with the: 
exception of the Phalzenopsis house—should be opened sufficiently to admit 
of a good volume of air at night whenever the outside conditions are 
favourable for such a procedure. Also, to strengthen and solidify the new 
growth, in bulbs and leaves, the shading may be removed earlier in the 
afternoon as the season declines, the plants at this end of the season being 
much better able to withstand strong light and more air than they were at 
the beginning. Some few species have now completed their season’s: 
growth, and many more are fast approaching that stage. When growth is. 
finished at this early period, it is generally advisable, if possible, to remove 
such plants from the house in which a large number are still growing 
actively. If a department exists in which these early species can be 
accommodated, where they may gradually receive more light, air, and less. 
moisture, so much the better. If not, they may be grouped together in the 
same compartment, giving them a position by the door, or some other suit- 
able place, so that they may have their special requirements more easily 
and surely attended to. Do not withhold water too suddenly at the root, 
but allow them to lapse into a dormant state gradually. These remarks 
will apply to a few Cattleyas which will either have finished their growth 
by now or will do so some time during this month. The two principal ones- 
are C. Gaskelliana and C. Warscewiczii (gigas), which will not only have 
completed their new growths, but have flowered also, and desire nothing 
more than to be kept quiet. The same will also apply to C. Rex and C. 
Warneri. 
A few Dendrobiums will also now have their pseudo-bulbs completed, and 
will soon demand cooler and more airy conditions. Dendrobiums are more 
impatient in this respect than Cattleyas, as are also Thunias, Pleiones, 
Ccelogynes, and other East Indian mountain species. Dendrobiums and. 
Cattleyas are apt to break a second time the same year, that is to say they 
start a new growth immediately from the base of the newly formed pseudo- 
bulb. However careful one may be, a certain percentage of his plants are 
almost sure to do this. Such new growths should be allowed to remain, but 
simply be unheeded, giving the plants the more airy treatment, as before 
advised, exactly the same as if no secondary growth existed. It is a great 
mistake to still keep the plants in an active temperature in order to bring 
these second growths to maturity, for it is unlike their natural condition 
abroad. 
Calanthes are now growing vigorously, and require an abundant supply of 
moisture at the root, but it must be given with discretion, or spot and disease 
will be the result. Where the pots have become full of roots, alternate 
