J. Mark Trice, 84, who retired as secretary to the Senate (Republican) Minority in 1974 after more than 50 years on Capitol Hill, died of cancer July 3 at Sibley Memorial Hospital. He lived in Bethesda.

Mr. Trice was a Senate page from 1916 to 1919, then spent a decade as secretary to the Senate sergeant-at-arms. After three years of private law practice in Washington, he served as Senate deputy sergeant-at-arms from 1932 to 1946.

In 1947, he became secretary to the Senate majority (Republican), and was secretary to the Republicans when they formed the minority party in the 81st and 82nd congresses. He then served as Senate secretary from 1953 to 1955. From that time, until retiring in 1974, he was Senate minority secretary.

His jobs on the Hill included maintaining information on the whereabouts of all Republican senators, knowing the legislation important to the party, and seeing that the wishes of the Senate Republican leader and whip were carried out. As Senate party secretary he was technically in charge of party activities on the Senate floor.

He served as executive secretary of the Joint Congressional Inaugural Committees of 1953, 1957 and 1969, and as a parliamentarian of the Republican National Committee. He also had held a variety of posts at national party conventions and had been secretary of a number of Senate Republican conference committees.

Mr. Trice was a native of Washington. A graduate of the Emerson Institute, he earned a law degree at Georgetown University in 1928.

He had served on the national board of the American Red Cross and was a member of Metropolitan Memorial United Methodist Church in Washington and an honorary member of Congressional Country Club.

Survivors include his wife, the former Margaret Linkins, and a daughter, Linda Smith, both of Bethesda, and two grandchildren.

JOHN MacKINNON,

64, a retired government official who was a former deputy assistant postmaster general and treasurer of the U.S. Postal Service, died July 4 at Fairfax Hospital. He had amyotrophic lateral sclerosis.

He held his Postal Service positions from 1971 to 1973. He then spent about three years as a financial consultant to ACTION. From 1978 until retiring in 1985, he was treasurer of the Pension Benefit Guaranty Corp.

Mr. MacKinnon, who lived in Alexandria, was a native of Dearborn, Mich. He was a graduate of the University of Michigan and served with the Navy in the Pacific during World War II.

He worked in private industry in the New York area and Louisiana, and held financial posts with American Machine & Foundry and United Technologies, before moving here in 1967. He then spent the next four years with the Federal National Mortgage Association, where he became treasurer.

He was a member of Immanuel Church-On-The-Hill, an Episcopal Church in Alexandria.

Survivors include his wife, the former Carol McNeir Cox, of Alexandria; a son, John A., of Tuxedo Park, N.Y.; a daughter, Margaret Lee MacKinnon of Sutton, Mass.; two sisters, Agnes MacKinnon of Dearborn, and Rebecca Leonard of Salt Lake City, and two grandchildren.

LAWRENCE E. WILLIAMS,

47, a teacher in the D.C. schools and a specialist in the use of computers as teaching tools, died of cancer July 1 at his home in Washington.

Mr. Williams was born in New York City and reared in Springfield, Mass. He graduated from Westfield State Teachers College in Westfield, Mass., and earned a master's degree in educational administration at the University of the District of Columbia.

In 1961, he moved to Washington and began his career with the D.C. schools. He was an elementary teacher and a math resources teacher. More recently, he helped organize the schools system's Computer Literacy Laboratory, where teachers and supervisors are trained to use computers to teach reading. He had worked at the laboratory for three years.

Mr. Williams also had been a consultant to the Houghton Mifflin publishing company. He worked on a recently published textbook called "Mathematics" and on a dictionary for intermediate level students as well as other projects.

Survivors include his wife, Frances Batch Williams, and a daughter, Vietta S. Williams, both of Washington, and two sisters, Mona Williams Blake of Atlanta and Illona M. Williams of Washington.