1915. "Dr. Walter F. Rittman. Gasoline plant at Pittsburg." Bureau of Mines chemical engineer Walter Rittman developed the "Rittman process" used in petroleum refining. Harris & Ewing Collection glass negative. View full size.
  BUY PRINT    1915. "Dr. Walter F. Rittman. Gasoline plant at Pittsburg." Bureau of Mines chemical engineer Walter Rittman developed the "Rittman process" used in petroleum refining. Harris & Ewing Collection glass negative. | Click image for Comments. | Home | Browse All Photos