University of Arizona

Everyone is welcome to visit Special Collections without an appointment from 9 am - 5 pm, Mon - Fri. Note that beginning April 1st, our hours will be 9 am - 4 pm

Mining

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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