ORcniDs: now to grow TiTE>f successfully. 27 



heat, and y((t tho conditions of theso plants at the tinio of injiny may 

 have been overlooked and some other reason assigned for the cause. 

 Temperatui-e and atmosphere must therefore go hand in hand, 

 and with the judicious application of fire, or sun heat, with air and 

 moisture, a suitable temperature for all seasons can easily be 

 obtained. Just a word or two as to a general rule. Avoid an 

 intei-nal nmggy atmosplusre in close gloomy weather, and a fiery dry 

 temperature in cold wciather, or excessive heat or cold at all times. 

 The following tables are given as a guide to amateurs in 

 securing the necessary temperature for Cool Orchids, Intermediate- 

 house Orchids, and Warm or Hothouse Orchids, the degrees given 

 being an average desideratum ; a little variation either way may be 

 allowed, without in any way injuiing the plants : — 



COOL HOUSE. 



IXTERMEDIATE HOUSE. 



WARM HOUSE. 



I Day with 

 Sun. 



Winter 70 



Spring 80 



Summer 80 to 90 



Autumn 75 to 85 



Day without i 

 Sun. I 



65 



70 



78 



70 to 75 



Night. 



63 



68 

 75 

 70 



Morning. 



60 



63 

 68 to 70 

 65 to 70 



