Engaged. Miss Margaret Dorothy Kahn, 26, of Manhattan, daughter of Banker Otto Hermann Kahn; to John Barry Ryan Jr., 27, reporter for a New York tabloid newspaper, grandson of Financier Thomas Fortune Ryan.

Elected. General John Joseph Pershing and Edwin B. Parker, umpire of the U. S.-Germany Mixed Claims Commission; to the board of directors of the Riggs National Bank of Washington, D. C. This is the first business position General Pershing has ever accepted.

Elected. Robert Tyre Jones Jr., golfer, lawyer, to the board of directors of the Atlanta Trust Co., succeeding his grandfather, Robert Tyre Jones Sr.

Elected. Robert E. Wood, 47, U. S. Army general (resigned), vice president of Sears, Roebuck & Co., to be president; to succeed the late Charles M. Kittle. General Wood is a brother-in-law of Protestant Episcopal Bishop Ernest Milmore Stires of Long Island and of Senator Thomas Hardwick of Georgia.

Elected. Robert Livingston Clarkson, 36, vice chairman of the board of directors, to be president of the Chase National Bank of Manhattan.

Elected. Eugene R. Black, onetime president of the Atlanta Trust Co., to be governor of the Atlanta Federal Reserve Bank; to succeed Maximilian Bethune Wellborn, retired after 13 years as governor.

Elected. T. M. Girdler, vice president in charge of operations for Jones & Laughlin Steel Corp. of Pittsburgh, to be president; to succeed Charles A. Fisher, resigned to withdraw from active business.

Elected. James S. Cobb, for 15 years vice president of Abercrombie & Fitch Co., (sports goods) to be president of the company; to succeed Ezra H. Fitch who has sold his holdings to associates.

Appointed. Dr. Charles Greeley Abbot, 55, famed scientist; to be Secretary of the Smithsonian Institution at Washington, D. C.

Died. Archibald Gary Coolidge, 61, famed professor of history at Harvard, at one time attached to the U. S. Diplomatic Service, author of works on political history, editor of Foreign Affairs; at his home, in Boston.

Died. Thomas Hardy, 87, famed novelist, poet; at his home in Dorchester, England.

Died. Signorinetta, 23, winner of the Derby Stakes at Epsom (1908) at 100-to-1, and last filly to capture this classic; on the estate of Lord Rosebery, her owner, at Epsom.