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David Campbell Montgomery died Tuesday, December 12, 2023, at Kendal at Hanover from Parkinson’s disease. 

He was born on March 5, 1936, in Milan, Missouri to Ruth Campbell Montgomery, a high school teacher of English and Spanish and Merrill E. Montgomery, a lawyer and Probate Judge. 

He graduated from Milan High School in 1953 and received a B.S. degree from the University of Wisconsin, Madison in 1956 where he was inducted into Phi Beta Kappa. 

At the University of Wisconsin, he met Shirley Imig, a fellow student, and they were married in Princeton, NJ in 1957. He received a Ph.D. in physics from Princeton University in 1959. 

David served on university physics faculties at the University of Maryland, the University of Iowa, the College of William and Mary, and Dartmouth College. He also had visiting teaching and research appointments at several universities and laboratories in the United States, the United Kingdom, Europe, and Japan. David enjoyed working with colleagues from other countries and discussing politics and local customs with them. 

David was a prominent, internationally recognized expert in the field of plasma physics (the physics of ionized gases). He published two books: Plasma Kinetic Theory (1964) with Dr. Derek Tidman, and The Theory of the Unmagnetized Plasma (1971). 

David had a lifelong love of nature beginning with collecting snakes with his friends and going fishing with his grandfather when he was a boy. Later, a particular joy was going fishing, hiking, and canoeing with his daughters and grandchildren. He was concerned about the environment and joined the Sierra Club, serving for several years on the board of the Upper Valley Sierra Club. 

David was predeceased by his parents: Ruth Campbell Montgomery and Merrill Edward Montgomery, and by his brother Merrill Edward Montgomery, Jr. 

He is survived by his wife and loving companion of 66 years, Shirley Imig Montgomery, his daughters Elizabeth Montgomery, of Hidden Valley Lake, CA and Kathleen Sutton (Eric), of Silver Spring, MD. grandchildren Wynn Sutton (Cycielya) of Baltimore, MD, and Scott Sutton of Bethesda, MD. Also surviving are brothers in law, Ronald Imig of Simi Valley, CA and Gerald Imig of Franklin, WI and five Imig nieces and nephews and their spouses and children. 

A memorial service was held at Kendal at Hanover on Saturday, January 20th, 2024 at 3:00 p.m. 

In lieu of flowers, donations may be made in David’s name to one of his favorite charities: Listen Community Services, 60 Hanover St., Lebanon, NH 03766; Kendal at Hanover Eudora Dronge Fund (assists health care staff seek educational opportunities), 67 Cummings Rd., Hanover, NH 03755; The Southern Poverty Law Center, 400 Washington Ave., Montgomery, AL 36104, or a charity of your choice.