18 THE ORCHID REVIEW. (JANUARY, IgIt. 
the lip very rich purple-crimson with radiating golden lines. It is one of 
the handsomest and most popular Cattleyas known, its colours forming a 
very striking contrast. In some localities C. Dowiana aurea grows in 
company with C. Warscewiczii, with which it crosses, yielding the 
handsome natural hybrid C. Hardyana, which is not infrequently found in 
importations of the two species, and which has also been raised artificially 
on several occasions. 
CALENDAR OF OPERATIONS FOR JANUARY. 
By J. T. BARKER, THE WEsT HILL, HESSLE, E. YORKs. 
As the days gradually lengthen, we can look for signs of renewed activity 
amongst our plants, but during the present month the winter treatment 
must be continued, as nothing is gained by pushing any — at this time 
of year. 
TEMPERATURES.— Lhe following temperatures should be maintained as 
nearly as circumstances will permit :— 
Cool house: day, 50° to 55°, with sun 60°; night, 50°. 
Intermediate house: day, 60° to 63°, with sun 66°; night, 57° to 60°. 
Cattleya and Mexican house: day, 60° to 65°, with sun 68°; night, 58° 
to 60°. 
East Indian house: day, 65° to 70°, with sun 75°; night, 65°. 
These temperatures should be maintained as nearly as possible, but the 
outside conditions should be duly taken into consideration, and should the 
weather be extremely cold, a drop of a degree, or even two, will do no 
harm ; in fact it is better than attempting to reach the higher figures by 
excessive firing, which will do more harm than good. As the days lengthen, 
we may expect the cold to strengthen, and the heating of the several houses 
must have every attention. The fire heat may be economised by letting the 
blinds down at night, or by putting coverings on the glass of the different 
materials supplied for that purpose, but these should always be removed as 
soon as possible in the morning, as it is most essential that the plants 
should receive all the light possible at this dull season. 
VENTILATION.—Ventilate as freely as possible during mild weather, 
chiefly by the means of the bottom ventilators, as a stagnant atmosphere is 
injurious to the plants. And, if possible, alvays keep some one or more of 
the ventilators open, if only say for an inch or so, as I am quite convinced 
that the majority of our plants receive too little air. 
DampiInc.—The amount of moisture in the air must be regulated 
according to the amount of fire heat used, and other circumstances, and all 
the paths and walls must be damped once or twice a day, according to the 
outside conditions. On a damp, moist, mild day they will not require so 
ae as on a ae — day. 
