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Dr. W.F. Rittman, between c1915 and c1920. Creator: Bain News Service.
HRM24A42_323

Dr. W.F. Rittman, between c1915 and c1920. Creator...

Bureau of Mines, low temperature laboratories, between 1905 and 1945. Creator: Harris & Ewing.
HRM22B06_145

Bureau of Mines, low temperature laboratories, bet...

Bureau of Mines Interior Dept., between 1910 and 1920. Creator: Harris & Ewing.
HRM22B07_133

Bureau of Mines Interior Dept., between 1910 and 1...

Interior Dept. - Bureau of Mines, between 1910 and 1920. Creator: Harris & Ewing.
HRM22B06_435

Interior Dept. - Bureau of Mines, between 1910 and...

Bureau of Mines, Dept. of Int., between 1910 and 1920. Creator: Harris & Ewing.
HRM22B06_255

Bureau of Mines, Dept. of Int., between 1910 and 1...