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48 SILVER. on. Native silver also occurs in Bohemia, in veins in clay-slate, along with galena or lead-glance, blende, silver- glance, cobalt, nickel, sparry iron-ore, iron-pyrites, quartz, and calcareous-spar: At Rudelstadt in Silesia, along with red silver-ore, quartz, calcareous-spar, and lamellar heavy-spar: At Furstenberg in Suabia, in calcareous- spar, with quartz, and lamellar heavy-spar : At Wittichen, also in Suabia, in granite, along with black cobalt-ochre,' white cobalt-ore, seldom with native bismuth, red silver- ore, and iron-glance : At Iteinerzau in Wirtemberg, along with silver-glance, and red silver-ore, and ores of cobalt, bismuth, copper, iron, and manganese; and the vein-stones are lamellar heavy-spar and fluor-spar; in the mine named Herzog Frederick, in the same country, it is associated with uran mica, and lamellar heavy-spar, and fluor-spar. At Allemont in France, it occurs in veins, along with native silver, silver-glance, red silver- ore, corneous silver-ore, ores of cobalt, native antimony, and nickel; and the vein-stones are calcareous spar, mixed with asbestus and epidote : At Guadalcanal in Spain, along with red silver-ore, and calcareous-spar : At Fel- sobanya in Hungary, along with native gold and iron- shot quartz: At Schemnitz, with white and brown lead- ore, native gold, brittle silver-glance, and quartz; and in other mines, also in Hungary, associated with silver- glance, brittle silver-glance, red manganese-ore, brown- spar, and calcedony ; At Kapnik in Transylvania, with silver-glance, red silver-ore, blende, brown-spar, and quartz. Asia. Native silver is collected in several parts of Si beria : thus, at Kolywan, in the mine of St Andreas, it occurs disseminated in hornstone, along with brittle sil ver-glance; at Schlangenbcrg, in various forms, along with