III. Minerals applicable to certain Chemical Manufactures, and their VII. Materials applicable to common and Decorative Construction. Slates Flagstones Common Lime......... Hydraulic Lime......... Bricks and Brick-clays................................ Drain Tiles.......... VIII. Refractory Materials, Pottery Clays, and Pottery. Plumbago or Graphite........ Soapstone........ Potstone Mica Rock....... Mica Asbestus........ Fire Clays........ Sandstone, refractory......... Pottery Clay and Pottery.......... IX. Materials for Grinding and Polishing. Whetstones Hones Bath-brick.. Tripoli..... Grindstones.. Millstones X. Minerals applicable to the Fine Arts and to Jewelry. Lithographic Stone....... Porphyries...... Labradorite............................. Albite......... Perthite........ Jasper Conglomerate...... Amethystine Quartz..... Agates...... Canadian Precious Stones...... 106 .... 108 110 ...... 113 114 120 121 123 123 124 124 124 ...... 125 .... 125 126 127 129 129 .... 129 129 130 131 132 ... 132 133 133 133 134 134 134 Collections of Rocks, Minerals and Ores, exhibited by Dr. ILLUSTRATIONS. 1. Drawing showing the mode of occurrence of Native Copper at Michipicoten Island, Lake Superior,............ 2. View of Fairbanks' Petroleum Well, at Petrolia, O............................................... 24 60 |