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ORDER 10.Pyrites. Genera. 1. Nickel pyrites. 2. Arsenic pyrites. 3. Cobalt pyrites. 4. Iron pyrites. 5. Copper pyrites. ORDER 11.Glance. Genera. 1. Copper glance. 2. Silver glance. 3. Lead glance. 4. Tellurium glance. 5. Molybdenum glance. 6. Bismuth glance. 7. Antimony glance. 8. Melane glance. ORDER 12.Blende. Genera. 1. Glance blende, 2. Garnet blende. 3. Purple blende. 4. Ruby blende. ORDER 13.Sulphur. Genus. 1. Sulphur. CLASS III. ORDER 1.Resin. Genus. 1. Melichrone resin. Genus. 1. Mineral coal Among the works on mineralogy, the following are worthy of notice: Traite de Mineralogie, par A. Brongniart (Paris, 1807); a Familiar Introduction to the Study of Crystallography, by Henry James Brooke (London, 1823); an Elementary Introduction to the Knowledge of Mineralogy, &c, by William Phillips (London, 1823); Handbuch der Mineralogie,, von C. A. S. Hoffmann (Frieberg, 1811, and continued by A. Breithaupt); Mohs's System of Mineralogy, translated by William Haidinger (Edinburgh, 1825); Traite de Crystallographies par M. VAbM Haicy (Paris, 1822); Traite de MMralogie, par M. VAbU Haily^ (Paris, 1822); Handbuch der Oryktognosie, von Karl Casar von Leonhard (Heidelberg, 1826); Brewster's Treatise on Mineralogy (Edinburgh, 1827); Die Mineralogie der A. Hartmann (Ilmenau, 1829). The study of minerals has received considerable attention during the last twenty years, in the U. States, though, for the most part, that attention has been devoted to the discovery of localities and the formation of cabinets. Already we have discovered nearly all the species found in other quarters of the globe, as may be noticed by consulting the different articles in the department of mineralogy in this work; and several entirely new species have been added to the science by American mineralogists. The only considerable work upon the science which has as yet appeared in the U. States is that of professor Cleaveland, and which was founded, for the most part, on the systems of Brongniart and Haiiy. It has passed through two editions, and its author is now understood to be preparing an improved edition for the press.