Barringer's Description of Minerals of Commercial Value. Oblong, morocco, 2 50 Boyd's Resources of Southwest Virginia. 8vo, 3 00 Boyd's Map of Southwest Virginia. Pocket-book form. 2 00 * Browning's Introduction to the Rarer Elements. 8vo, 1 50 Brush's Manual of Determinative Mineralogy. (Penfield.) 8vo, 4 00 Chester's Catalogue of Minerals. 8vo, paper, 1 00 Cloth, 1 25 Dictionary of the Names of Minerals. 8vo, 3 50 Dana's System of Mineralogy. Large 8vo, half leather, 12 50 First Appendix to Dana's New "System of Mineralogy." Large 8vo, 1 00 Text-book of Mineralogy. 8vo, 4 00 Minerals and How to Study Them. 12mo, 1 50 Catalogue of American Localities of Minerals. Large 8vo, 1 00 Manual of Mineralogy and Petrography. 12mo, 2 00 Douglas's Untechnical Addresses on Technical Subjects. 12mo, 1 00 Eakle's Mineral Tables. 8vo, 1 25 Egleston's Catalogue of Minerals and Synonyms. 8vo, 2 50 Goesel's Minerals and Metals: A Reference Book. 16mo, mor., 3 00 Groth's Introduction to Chemical Crystallography (Marshall.) 12mo, 1 25 Iddings's Rock Minerals. 8vo, 5 00 Johannsen's Key for the Determination of Rock-forming Minerals in Thin Sections. (In Press.) * Martin's Laboratory Guide to Qualitative Analysis with the Blowpipe. 12mo, 60 Merrill's Non-metallic Minerals. Their Occurrence and Uses. 8vo, 4 00 Stones for Building and Decoration. 8vo, 5 00 * Penfield's Notes on Determinative Mineralogy and Record of Mineral Tests. 8vo, paper, 50 Tables of Minerals. 8vo, 1 00 * Richards's Synopsis of Mineral Characters 12mo, morocco, 1 25 * Ries's Clays. Their Occurrence, Properties, and Uses. 8vo, 5 00 Rosenbusch's Microscopical Physiography of the Rock-making Minerals. (Iddings.) 8vo, 5 00 * Tillman's Text-book of Important Minerals and Rocks. 8vo, 2 00 MINING.