Photographs of Bureau of Mines experimental stations from the U.S. Department of the Interior, ca. 1925-1950 (nos. 5-21)

998-5: Charles R. Robertson Lignite Research Laboratory, Grand Forks, ND, ca. 1950 998-6: Air view of the Denver Federal Center, Denver, CO 998-7: Central Experiment Station at Pittsburgh, PA 998-8: Petroleum Experiment Station, Bartlesville, OK 998-9: New office building at Juneau, AK 998-10: Headquarters for the Minerals Thermodynamics Branch at Berkeley, CA 998-11: North Central Experiment Station on the University of Minnesota campus, Minneapolis, MN, ca. 1925 998-12: Intermountain Experiment Station at Salt Lake City, UT 998-13: Northwest Experiment Station, Seattle, WA 998-14: Southern Experiment Station, Tuscaloosa, AL 998-15: Southwest Experiment Station, Tucson, AZ 998-16: Electrometallurgical Branch at Boulder City, NV 998-17: Eastern Experiment Station on the University of Maryland campus, College Park, MD 998-18: Mississippi Valley Experiment Station, Rolla, MO 998-19: Mt. Weather Station at Bluemont, VA 998-20: Petroleum and Oil-shale Experiment Station, Laramie, WY 998-21: Northwest Electrodevelopment Laboratory, Albany, OR