Guy Hariss was a chemist who developed Z200, a chemical reagent used by mining companies in the flotation process to separate copper minerals from waste minerals. Hariss was born in 1914 and grew up in San Bernardino, California. He attended San Bernardino Valley Union Junior College before moving to UC Berkeley where he graduated as a chemistry major. Hariss continued his education and received a PhD from Stanford in 1941. From there he went on to work for Dow Chemical and developed the chemical reagent, Z200. He retired from the company in 1982 and went on to research reagents for coal and mineral processing at Penn State and UC Berkeley. In this interview Hariss discusses his family background, San Bernardino, Ku Klux Klan c. 1926, Boy Scouts, education, UC Berkeley chemistry, time at Stanford, training nuns, paying off loans, William S. Merrill Company, developing Z200, marriage and family, teaching, Dow Chemical and retirement.