"210 RADIATION. 



A. Rocks and barren lands are so 

 compact and hard, that they can neither 

 absorb nor radiate much heat; and (as 

 their temperature varies but very little) 

 very little dew distils upon them. 



Q. Why does DEW fall more abundantly on 

 CULTIVATED soils, than on BAEREN lands ? 



A. Because cultivated soils (being 

 loose and porous) absorb heat freely 

 during the day, and radiate it by night ; 

 and (being much cooled by the rapid 

 radiation of heat) as the vapour of the air 

 passes over them, it is plentifully 

 condensed into dew. 



Q. Shew the WISDOM of GOD in this arrange- 

 ment. 



A. Every plant and inch of land 

 which needs the moisture of derv, is 

 adapted to collect it; but not a single 

 drop even of dew is wasted, where its 

 refreshing moisture is not required. 



Q. Shew the WISDOM of GOD in making 

 polished METAL and woollen CLOTH BAD 

 RADIATORS of heat. 



A. If polished metal collected dew as 

 easily as grass, it could never be kept dry, 



