Recent Articles on Petroleum and Allied Substances: Issues 2318-2375

Fatalities at Coal Mines in September, 1922: Issues 2376-2450

Coal-mine Fatalities in February, 1923: Issues 2451-2500

Explosives Used in December, 1923: 1923-1924

Recent Articles on Petroleum and Allied Substances: Issues 2090-2119; Issues 2121-2129

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

Metal-mine Accidents in the United States During the Calendar Year 1935: Issues 410-416

Consumption of Explosives in September, 1925: Issues 2709-2733

Explosives Used in April, 1924: Issues 2601-2639

Quarry Accidents in the United States During the Calendar Year 1939: Issues 437-447

Permissible Electric Cap Lamps and Ventilation in Certain California Mines and Water-tunnel Construction: Issues 357-366

Consumption of Explosives in September, 1925: Issues 2712-2721

Consumption of Reagents Used in Flotation, 1923-24: Issues 2705-2711

Metal-mine Accidents in the United States During the Calendar Year 1928: Issues 320-326

Coal-mining Royalties and Leasing Conditions in Williamson and Franklin Counties, Illinois (District No. VI)

Bauxite: Float-and-sink Fractionations and Flotation Experiments, Issues 312-319

Laboratory Studies of the Inflammability of Coal Dusts: Effects of Fineness of Coal and Inert Dusts on the Inflammability of Coal Dusts, Issues 386-394

Metal-mine Accidents in the United States During the Calendar Year 1936: Issues 419-424

Mining Petroleum by Underground Methods: A Study of Methods Used in France and Germany and Possible Application to Depleted Oil Fields Under American Conditions, Issues 348-356

Metal-mine Accidents in the United States During the Calendar Year 1938