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278 MINERALOGICAL REMARKS: The fpecific gravity of this piece was 2,332 3 another, which was variegated with red, 2,342 ; another, with more red in it, 2,381. In Mr. Pallas’s Nordi/be Beyträge there is an account of -a foffil lately found near that diftant corner of the world, Kam{chatka, which fo perfe€tly correfponds with this, that I think, ‘as works in the German language are fo feldom tranflated into ours, I fhall be thanked, by our Englifh mineralugifte, for laying-a tranflation of it before them. “If we with to increafe the names of foffils,” fays Mr. Pallas, « which is now much the fafhion, the ftone from the Marekanian mountains, on account of its fingular nature and properties, deferves a particular name, much more than many new-named foffils. Molt foffils, with fearce any variation, are common to different places: this is particularly the cafe with the mountain rocks, which are repeated in every chain of mountains ; but I know of no example of one being found in any part of our globe, fimilar to this. The (Bergart) mountain-rock is very fragile, and confifts of remarkably thin, pearl-coloured, glafly, fhining, and tranfparent leaves, which are curved and interwoven in one another in all pofüble ways; they may be crumbled between the fingers, although when united together they fcratch glafs : it is not porous like pumex, and has fill lefs the appearance of lava: it has much more the appearance of foliaceous zeolite, and when broken looks like pounded glafs. In this 6 mals 26
