Electrostatic separation of ores in its present form is generally known as the Huff process, from the name of Charles H. Huff, of Boston, Mass.,
Torches were used by the early Romans for mine-lighting, and these were followed by open lamps or earthen jars filled with tallow or oil, and
By the old method of determining platinum in ores and bullion, the silver-alloy first obtained in the regular course of assay is parted in strong
Knowledge of the thermal capacity of gases is of great importance in making metallurgical calculations. The metallurgist is frequently called upon to investigate and determine furnace
The early development of the reverberatory furnace for smelting copper ores was the work of the Welsh smelters, particularly those of Swansea. The first record
Outline of the Chloridizing Leaching Process: The Mines Operating Co.’s plant at Park City, Utah, was designed to treat the low-grade fillings in the old stopes
The iron-nail method of assaying has been used for a number of years, but has not met with the approval of all assayers. The method
From time immemorial the methods of assaying any materials for silver and gold were in reality nothing but laboratory smelting methods. The writer arrived in
Someone some time ago remarked that some chemists still insist on telling us how to determine copper by the electrolytic method. The writer must confess
Wood burning assay furnaces are made with single and double muffles and are much like the soft coal furnaces except that a larger firebox and