The following report provides data collected during an investigation in the Columbia River. The purpose of this investigation was to research the radioactivity present in the bottom-living organisms of the river.

Report issued by the Bureau of Mines discussing the technological advances made in the mining industry between 1931 and 1941. Mechanized methods for mining operations are presented. This report includes tables, illustrations, and a map.

Report issued by the U.S. Bureau of Mines discussing the annual report over the research and technology of coal during 1941. As stated in the foreword, "these investigations increase our fund of exact knowledge on the properties and composition of American coals and lead to better methods in mining, preparing, storing, and utilizing coal" (p. 4). This report includes tables, illustrations, photographs, and a map.

Report issued by the U.S. Bureau of Mines on the sampling of chrome ore deposits in the western United States. Physical properties of the samples collected are presented. This report includes tables.

From Purpose and Scope: "This bulletin presents the results of an investigation of domestic stokers at the Northwest Experiment Station of the Bureau of Mines. Previous publications have dealt with the burning characteristics of Washington coals on a domestic overfeed stoker, a clinker-type domestic underfeed stoker, and an ash-removal-type domestic underfeed stoker designed for burning anthracite. This report includes all the principal results obtained on the three domestic stokers tested and compares these results with those obtained on the same hot-water boiler by hand-firing and oil-firing."

Report issued by the U.S. Bureau of Mines on the coking-coal testing done on Washington coal. Descriptions of the testing, and properties of the coals tested are presented. This report includes tables, and photographs.

Report issued by the Bureau of Mines over studies conducted on the iron-nickel deposits of Kittitas County, Washington. As stated in the introduction, "the investigation consisted of road building, diamond drilling, sampling, and metallurgical tests" (p. 1). This report includes tables and maps.

Report issued by the U.S. Bureau of Mines on investigations of the magnetite-bearing sands near the Columbia River between Oregon and Washington. Properties of the sands and magnetite deposits are listed. This report includes tables, maps, and illustrations.

Report issued by the U.S. Bureau of Mines on testing done on a variety of American coals collected from 32 coal beds across the country. The carbonizing properties of samples tested at 3 different temperatures are presented. This report includes tables, and graphs.

Report issued by the Bureau of Mines on exploration by diamond drilling in Pend Oreille County. Results of the exploration are presented. This report includes tables, maps, illustrations, and photographs.

From Introduction Purpose of Investigation: "To determine some of the physical and chemical properties of known Pacific Northwest diatomites, the present investigation was started in 1938 by the Bureau of Mines in cooperation with the College of Mines, University of Washington.

Report issued by the Bureau of Mines discussing exploration of Lewis County lignite deposits in Washington. History, development, and drilling methods are presented. This report includes tables, maps, illustrations, and photographs.

Report issued by the Bureau of Mines regarding studies conducted on lead-zinc mines in Stevens County, Washington. As stated in the introduction, "this report presents the factual data obtained from the trenching and sampling operations" (p. 1). This report includes tables, maps, and illustrations.

Report issued by the Bureau of Mines over investigations of mines in Stevens County, Washington. The history, geology, and physical features of the mines are presented. This report includes tables, maps, and illustrations.

Report issued by the U.S. Bureau of Mines discussing fatalities of mine workers while wearing self-contained oxygen breathing apparatuses. Descriptions of the circumstances surrounding the deaths of 26 workers are presented. This report includes a table.

Abstract: The northern, eastern, and southern parts of the Olympic Peninsula, Wash., contain many small deposits of manganese. Most of the deposits consist of complex manganese silicates with some carbonates, although 16,275 tons of hausmannite (Mn304) ore was mined at the Crescent mine during 1924-26. About a hundred tons of silicates have been mined from various properties, mainly for experimental purposes. Future production probably will not be large, because the silicate ores are of low grade and are difficult and expensive to treat. Moreover, most of the deposits are difficult of access, and most of the ore bodies are small isolated lenses and thin tabular bodies. The deposits are mostly in red limestone or red argillite near contacts with basalt, but a few of them are in basalt.

From Introduction: "The Mount Vernon nickel-gold deposit is 4 1/2 miles southeast of the city of Mount Vernon, Skagit County, Wash. The writers believe that the nickel was originally present in the serpentinized peridotite and that it was dissolved and redistributed by ascending hydrothermal gold-bearing solutions while the serpentine was being altered into the silica-carbonate rock."

Report issued by the Bureau of Mines over the operations of the Nonmetals Division during 1942. The work done by the division is discussed. This report includes tables, illustrations, and photographs.

From Forward: "The first part of this report discusses the details of the plant equipment and procedure. The second part of the report discusses in detail the relationship between between meteorological conditions in the valley and atmospheric diffusion processes. The third part gives the provisional operating regimes in force during the investigation, the amount of sulfur fixed and amount emitted to the atmosphere, and summary of data from the permanent recorders."

Report issued by the U.S. Bureau of Mines discussing safety hazards in western mines. Mine hoisting and haulage accidents are presented. Accident prevention is also discussed. This report includes tables.

From abstract: Tin and tungsten minerals occur in pegmatites and quartz veins at Silver Hill, in secs. 23 and 24, T. 24 N., R. 43 E., 11 miles southeast of Spokane, Wash.

Report issued by the U.S. Bureau of Mines on energy consumption in the western United States. A focus on coal as the primary energy source is presented. This report includes tables, graphs, maps, and illustrations.

Report discussing earthquake activity in the United States during 1940. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1941. The report is broken down by regions and has sections for specific earthquakes.