His scientific innovations, including the extraction of zinc from tailings in the "froth flotation" process, were published in his book Principles of Mining.
His scientific innovations, including the extraction of zinc from tailings in the "froth flotation" process, were published in his book Principles of Mining. During World War I, he was the head of the U.S. Food Administration, a position that vaulted him into the Supreme Economic Council after the war, and enabled him to set up a Quaker relief group to help with the logistics of distributing food in Europe. His support of Warren Harding led to his appointment as Secretary of (*) Commerce, a post which he left to run against the first Catholic candidate, Al Smith, for President. For 10 points, name this President under whose single term the Great Depression began.
His scientific innovations, including the extraction of zinc from tailings in the "froth flotation" process, were published in his book Principles of Mining.
Herbert {Hoover}