...Commerce records imports of "flint, flints, and flint stones, unground" from various countries. Theso imports are partly flint pebbles for use in grinding mills and partly material for MINERAL RESOURCES, 1915 — PART H. such use as are listed in this report. Separation or classification...

...blocks for tube mill lining is reported in the chapter on abrasive materials. IMPORTS. The Department of Commerce records imports of "flint, flints, and flint...for use in grinding^ mills and partly material for such uses as are listed in this report. The separation or classification of these materials, which...

...as insulating and flreproofing material. Quartz sold in the United. States, 1916-1920. Imports. — The Bureau of Foreign and Domestic Commerce records...flints, and flint stones, unground," from several t'ountries. These imports are mainly flint pebbles for use in grinding mills but partly material for...

...United Slates for pottery, paints, fillers, polishers, abrasives, and other uses, 1922 and 1923 • Includes only finely ground material. Figures probably...stones, unground" imported for consumption in the United Stales, 1918-1923 • Quantities not recorded prior to July, 1918. tons, valued at $56,440. During...