. . . . . "In this interview, Dr. Arnold O. Beckman, founder of Beckman Instruments, Inc. talks with Dr. A. James Diefenderfer of California State University, Fullerton, and Dr. Arnold Thackray of the Center for History of Chemistry. Dr. Beckman traces his career, beginning at the California Institute of Technology and continuing up to the development of the world's first pH meter."@en . "Interviews"@en . . . . . . . . "Arnold O. Beckman"@en . . .