(Gonl kucd frow iji'denhij.)

Perfect science, it is said, can imitate nature in so many modes of depositing the precious metal as to satisfy any sound-thinking mind that both processes aro nnalagous, with this difference only— that although "Art" may disintegrate minerals, it cannot canso the sumo par ticles to cohere as at first Only, take any quantity of" leaf gold," ealt, sulphur lime, etc ,—in short, to save trouble merely place tho gold leaf in a basin, corered over with fine salt and dry chloride of lime, on which pour sulphii' ic acid, and the gold will bo instantly " chloridcd," into which insert, say, two pieces of clean porous or cracked quartz; thpn take out one to he thoroughly dried, and in courso of timoits crovices will bo found to contain " crystals of solid gold;" whcreu: J , if I ho other slom\ after being fcaktnoutot the chloride of gold, ia im

meraedin " muriato of tin," or iron, its crevices, when dry, turn out a brown or purple-" oxide of gold." Next, dissolve j ome cleon, while quartz in alkali, and in the pulpacoous mass mix some of the first made chlorided liquor, and when it hardens it will exhibit nearly tho same ' green " line as the natural chloritic quartz, so plentiful in all gold-bearing regions. Afiaiu; Instead of using only the limpid liquor No. 1, mix up with tho chlorides of gold and iron, and the last stone will dry reddish, with here and there sulphur crystilled so far as to ex hibit sulphurretted gold, iron, &c Now, as itcamiot be dcuied that where any puro gold is ever intermixed with soluble silica, or what not, it must dry with it in some way or other, then, as such metals vvcro incorporated by art, so can art ex tract ihem as pure at at first; conseq quently what art can make and unmake, so can real scienco abstract from crude stones that which nature hath combined. 