Method of Experiment.—A number of charges of a quartzose ore are prepared, and weighed quantities of certain substances are added to the various charges. The effects on the charge and dish are noted.
Apparatus.—The muffle furnace, pulp scales, and accessories.
Reagents.—Quartz, grain lead, borax glass, copper, iron, cobalt, and manganese. In place of cobalt and manganese the oxides of these metals may be used.
Details of Experiment.—Weigh out five charges as follows—
Carefully mix each of the five charges, and scorify at a bright red heat, assisting the operation with a pinch of borax glass and a higher temperature where necessary.
Tabulate the results as follows :—
