In remembrance.

“John was an inspiring teacher and experimentalist. His educational passion was creating hands-on experiments built from ordinary parts you can find at any hardware store, what he lovingly called ‘mulch,’” said MIT senior lecturer in physics, and former King student, Peter Dourmashkin ’76 (physics), ’78 (math), PhD ’84. “He was MITx before MITx.” King was born in London and educated in France, Switzerland, and the United States. He came to MIT as an undergraduate in 1943 and completed his undergraduate studies in physics following war service for the U.S. Army, U.S. Navy, and the Harvard Underwater Sound Lab. He joined the MIT physics faculty in 1953. King was named the Francis L. Friedman Professor of Physics in 1974 and retired from MIT in 1996. King was renowned for his null experiments—those designed to test fundamental principles. He helped develop the atomic clock and invented the molecular microscope. King’s best-known experiment, still found on the first page John King, professor emeritus of physics, dies at 88