2 o6 FLINT GENUS. Chemical Characters. Before the blow pipe it foams up equally, if not ftronger than zeolite, but does not, like it, gelatinatc with acids. Constituent Parts. Klaproth. * Hajfenfratz. Prehnite of the Cape. Of France. Silica 43.83 50,0 Alumina 3°>33 20,4 Lime * 8 »33 a 3»3 Oxyd of iron 5,66 4.9 Water OO 0,9 Magnefia S' °>5 99,98 100 Beobacht undended, xi. p. 217. y. d.P. Fcbr. 178®, Geognostic and Geographic Situations. It occurs in Dauphiny, in veins, of the oldeft f 01 ' maticn, that traverfe greenitone flate; in Scotland, 011 the contrary, it is found in rocks belonging to tjic neweft floctz trap formation, as at Edinburgh, in balalt of the caltle rock. It is alio found in porphy ritic trreenftone, at Arthur’s Seat, and at h rilky * 6 between