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Gaius Jackson Slosser

Clergyman , theological seminary professor

Gaius Jackson Slosser, American clergyman, theological seminary professor.


Slosser, Gaius Jackson was born on June 2, 1887 in near Hoytville, Ohio, United States. Son of James Elliott and Mary Elizabeth (Jackson) Slosser.


Educated Ohio Northern U., summers 1903, 04. Bachelor of Arts, cum laude, Ohio Wesleyan University, 1912. Bachelor of Sacred Theology, Boston University School of Theology, 1915, School of Theology and Ministry, 1921.

Graduate study Harvard University Graduate School, 1915-1916. Doctor of Philosophy., King’s College University of London, England, 1928.


Served pastorates in Lynnfield, Chicopee, Medford, Holyoke and Natick, Massachusetts, 1917-1925. Professor ecclesiastical history and history of doctrine, Western Theological Seminary, Pittsburgh, 1928-1956, professor emeritus, from 1957. Member of faculty Johnson C. Smith U., Charlotte, North Carolina, from 1957.

Chaplain, captain Massachusetts National Guard 1917-1918, 1919-1923. Chaplain, First lieutenant then captain, 212th Engineers World War I. Then Reserves, 1919-1937.

Executive secretary Public Safety Committee, City of Chicopee, 1917. Director Vice-President department history. Presbyn Church United States of America, 1931-1960.


  • Other Work

    • Author: History of the 212th Engineers, 1918. Christian Unity, Its History and Challenge in All Communions and in All Lands, 1929. The Communion of Saints, 1937.History of the Westminster Assembly and Standards, 1943. They Seek a Country, American Presbyterianism, Some Aspects.


Fellow Royal History Society, London, England. Member Ohio Wesleyan Union, Delta Sigma Rho. Mason, Odd; Member American communications of Fifteen Theologians which prepared study texts for the Edinburgh Conference Admitted as an expert witness in church canon law and distinctions in numerous court cases, in Pennsylvania, New York and Connecticut, as between Greek and Eastern Rite churches and the Roman Catholic Church.

Moderator Presbyterian Synod of Pennsylvania, 1946-1947, president corporation of this synod and president of the board of trustees, 1946-1956.


Married Marguerite Louise Holbrook, June 27, 1917 (died 1925). Married second, Esther Victoria Thurston, April. Children: Ruth Elouise (Mistress William C. Gilkey), Gaius Jackson World War II Ordained to ministry Methodist Episcopal Church, 1917.

James Elliott Slosser

Mary Elizabeth (Jackson) Slosser

Marguerite Louise Holbrook

Esther Victoria Thurston

Ruth Elouise Slosser (Mistress William C. Gilkey)

Gaius Jackson World War II Ordained to ministry Methodist Episcopal Church Slosser