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Proposal entitled [redacted] Submitted on behalf of [redacted] June 1962 DEPARTMENT OF BIOLOGY June 14, 1962 Purpose of Study: The purpose of this proposal is a request for financial support to continue an investigation of microbial action on marine manganese nodules and terrigenous mineral sulfides, which the principal investigator has been pursuing since 1958. Very intensive work on these materials is being carried on by him, with fruitful results, during the current year, 1961-62, under a grant from the [...] of Stanford University, California. Since relatively little is known about microbial mineral transformation, and in view of current academic and practical interest of microbiologists, geologists, mining engineers, soil scientists, oceanographers, etc., in the subject, this research should make a valuable contribution to science. Summary of Past Work: a. Bacteriology of mineral sulfides. Attempts were made to evaluate the microbial flora isolable from unsterilized, crushed sulfi