Methods for the Recovery of Platinum, Iridium, Palladium, Gold, and Silver from Jewelers' Waste

The Value of Leakage Tests on Natural-gas Transmission Lines: Issues 2735-2736

Effect of Sulfur Compounds in the Air on Various Materials

A Study of the Production of Activated Carbon from Various Coals and Other Raw Materials

Analytical Methods for Certain Metals Including Cerium, Thorium, Molybdenum, Tungsten, Radium, Uranium, Vanadium, Titanium and Zirconium: Issues 209-212

Metal Carbonates: Correlations and Applications of Thermodynamic Properties, Issues 379-385

Recent Articles on Petroleum and Allied Substances: 1920-1921

Ochers and Mineral Pigments of the Pacific Northwest Occurrence: Possible Methods of Preparation, and Testing of Ochers, Siennas, and Colored Clays, Issues 301-311

Talc and Soapstone: Their Mining, Milling, Products and Uses: Issues 213-216

Official Changes in the Active List of Permissible Explosives and Blasting Devices for August, 1930: 1930-1931

Official Changes in the Active List of Permissible Explosives and Blasting Devices for September, 1929: 1929