Q. _Shew the WISDOM of GOD in making grass, the leaves of trees, and ALL VEGETABLES, EXCELLENT RADIATORS of heat._ A. As vegetables _require much moisture_, and would often perish without a plentiful deposit of dew, God wisely made them to _radiate heat freely_, so as to _chill the vapour_ (which touches them) _into dew_. Q. _Will polished METAL, smooth STONES, and woollen CLOTH, readily collect DEW?_ A. No. While grass and the leaves of plants _are completely drenched with dew_, a piece of _polished metal_, or of _woollen cloth_ (lying on the same spot) will be _almost dry_. Q. _Why would POLISHED METAL and WOOLLEN CLOTH be DRY, while grass and leaves are drenched with DEW?_ A. Because the polished metal and woollen cloth _part with their heat so slowly_, that the vapour of the air is _not chilled into dew_ as it passes over them. Q. _Why is a GRAVEL WALK almost DRY, when a grass plat is covered thick with DEW?_ A. _Grass_, (_being a good radiator_) throws off its heat very _freely_; but _gravel (being a very bad radiator)_ parts with its heat very _reluctantly_. Q. _Is that the reason why GRASS is SATURATED with DEW, and the GRAVEL is NOT?_ A. Yes. When the vapour of warm air comes in contact with the _cold grass_, it is instantly chilled into dew; but (as the gravel is _not so cold as the grass_) the vapour of air is _not so freely condensed_ as it passes over the gravel. Q. _Why does DEW rarely fall upon hard ROCKS and BARREN lands?_ 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 BARREN 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 arrangement._ A. Every plant and inch of land which _needs the moisture of dew_, 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_, and _free from rust_. Again, if woollen garments collected dew as readily as the leaves of trees, we should be _often soaking wet_, and subject to _constant colds_. Q. _Shew how this affords a beautiful illustration of GIDEON'S MIRACLE, recorded in the book of Judges, VI. 37, 38._ A. The _fleece of wool_ (which is a _very bad radiator_ of heat) was _soaking wet_ with dew: when the _grass_ (which is a most _excellent radiator_) was _quite dry_. Q. _Was not this CONTRARY to the laws of NATURE?_