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100 Calcareous Genus. fort found in Hadfinburgh, and which, according to Baron Born, are difficultly foluble in nitrous acid, and when calcined, and thrown into water, depofit a confiderable proportion of argill. i. Kaab. 304. 5. Various red and green marbles, fuch as the brownifhredmarbleof [ngerrpania,variegatedwith red and green. Its fradture earthy. Its hardnefs from 6 to 7. It abounds in petrifadtions, effervefces weakly with acids, by calcination becomes grey, and affords a bad 'lime. By Mr. Georgi’s ana- lyfis, it contains 65 per ct. of aerated calx, 17 of argill, 12 filex, 3,5 of falited calx, and 2 of iron, Act. Petrop. 178 2, 276. It entirely refem- bles that of Robock in Kinneculla, which Mr. Bergman teils us is fufible in a ftrong heat, and yet affords a weak lime, Mem. Stockb. 1768; and the green Carnpan of the Pyrenees, which, by Mr. Bayen’s analyfis, confifts of 0,65 aerated calx, 0,32 argill, and 0,03 of iron flightly cal cined. 6. Some bluifh and yellowifh grey limeftones of a compadt texture, fuch as that found in the bilhoprick of Fulda, which contains 73 per ct. of mild calx, and 25 of argill. Voight Fulda, 15. 7. Various porous limeflones, which afford a very poor lime, are pjobably of this family. 8. Mr. Ferber, in Nov. Adt. Petrop. 1785, p. 263, mentions a very fingular foffil, a marl cryftallized in an odtohedral form, like alum, which contains argill and filex; but nothing farther concerning it is as yet known. ad Family.