Documents from the Richard Mieritz mining collection. Description: Photos; correspondence; Watts, Griffis & McOut Limited packet; packet on the OD method; packet on the Coon-Cor process; drill quotes; equiptment information packets; equiptment lists; various quotations; flotation test report with flow sheet and assays; various diagrams and photos; notes; report on test results of sludge splitter with photos and diagram; index map of AZ mining districts.
