University of Arizona

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Manuscript

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  1. Letters Regarding the Russell Process

    Edward H. Russell was the inventor of the process for extracting silver from raw ore by lixiviation, using hyposulphite. This procedure was first successfully introduced in September 1884 at Silver Reef, Utah. Carbons of letters in bound letter copying ...

    castanoe - 2021-12-17 15:31

  2. Reuben Augustine Wilbur

    Includes appointments, correspondence, financial records and reports relating to his activities as United States Special Indian Agent and Physician for the Papago (now known as Tohono O'Odham) Indians; and personal andfamily papers including ...

    castanoe - 2024-03-01 13:21