Dr. Anthony J. Wilk, 64, a senior physicist with the Vitro laboratories division of Automation Industries Co. in Silver Spring, died July 9 at a hospital in Alamogordo, N.M., after a heart attack. He lived in Silver Spring and was vacationing in New Mexico when he was stricken.

Dr. Wilk was a native of Utica, N.Y. He was a graduate of the State University of New York and earned a master's degree and a doctorate in physics at Cornell University. After World War II service in the Army in Europe, he returned to Utica and did defense work for the government.

He moved to Washington in 1962 when he joined Cornell Aeronautics here as a physicist. He joined Vitro about 1970.

Dr. Wilk was a past president of the Good Counsel High School Parents Club and a lector at St. Andrew the Apostle Catholic Church and a member of its Men's Club. He also was a member of the Knights of Columbus, the Association of Old Crows, the American Gold Star Mothers and the Baltimore Fire Fighters Anchor Club.

A son, William A., a Marine Corps lieutenant, was killed in Vietnam.

Survivors include his wife, Regina of Silver Spring; four sons, Eric G., of Poolesville, Marine Corps Capt. Christopher A., of Camp Lejeune, N.C., Philip A., of Wheaton, and Damian A., of Beltsville; three sisters, Catherine Rahauiser and Stephanie and Ann Wilczynski, all of Utica, and 12 grandchildren.