l6 TEMPERATURE AND ATMOSPHERIC MOISTURE. 



the different temperatures, which different plants 

 require. It must be remembered that if a Carna- 

 tion and a Begonia, or a Rose and a Coleus, are 

 grown side by side, one or the other must suffer 

 from an improper degree of heat. Having noticed 

 the temperature given for each plant under its treat- 

 ment, so distribute them that the coolest locations 

 at command be given to those demanding the lowest 

 temperature. A thermometer should always hang 

 in the vicinity of plants, out of the reach of the sun, 

 that the window-gardener may be able to regulate 

 the degree of heat. 



Double windows are an excellent protection 

 against frost in winter, and are necessary to the 

 safety of window plants. But if not possible to 

 have them a paper may be pinned against the win- 

 dow and the curtain drawn down to protect them 

 from frost on very cold nights. The temperature 

 of the green-house ranges from forty to fifty de- 

 grees at night, raising to seventy degrees during 

 the day. 



Temperature and atmospheric moisture are the 

 main difficulties to contend with in the house. 

 Every part of the greenhouse is kept in a splashy 

 condition and the air is charged with moisture, 

 while the atmosphere of the living-rooms of our 

 houses is often hot, dry and dusty. It is impor- 

 tant that moisture should be constantly supplied by 

 evaporation from a vessel of water placed on the 

 stove or under the grates of the registers, and by 



