BENEFIT OF TWO OR MORE HOUSES. 19 



to circulate more freely in the house than if it 

 was not lowered at all : as in their native country 

 the nights are much colder than the day, in 

 order that the moisture of the ground may rise 

 more freely, and give support to those that de- 

 rive their entire nourishment from such sources. 



In winter the temperature of this house again 

 should be lowered to 65^ or 60^ during the day, 

 and at night 5° or 10° lower; by reducing the 

 temperature it will cause them to break stronger 

 when again raised; there will also of course be 

 some that are still growing during the winter 

 months, but the reduction will cause them to 

 strengthen and remain nearly dormant until heat 

 is again applied, or they be removed as before 

 advised. 



The other house will be more suitably devoted 

 to those from the colder parts of South America, 

 and Mexico, Guatimala, or other parts of North 

 America. They are generally found growing in a 

 comparatively low temperature, and often covered 

 with dew, similar to the hoar frost of this country. 



If those plants that inhabit the countries above 

 mentioned were kept in a house by themselves 

 during the summer, or while growing at a tempe- 

 rature not exceeding 70° during the day, with the 

 aid of sun-heat (air should be moderately given), 

 nor below 60°, and lowered 5° during the night. 



