Acting on a policy first voiced by President Conant at the Tercentenary Celebration in 1936, the American Association for the Advancement of Science last week urged scientists of the world to unite in an examination of the effects of science on society. At a gathering at Indianapolis, Indiana, the plan was advanced with the aim of promoting world peace and intellectual freedom.

George D. Birkhoff '05, Dean of the Faculty of Arts and Sciences and president of the Association, and George Lyman Kittredge '82. Gurney Professor of English Literature, emeritus, addressed the assembled scientists.

Palache Receives Medal

In Washington, at the annual meeting of the Mineralogical Society of America, honors came to Charles Palache, professor of Geology and retiring president of the society, who was awarded the Roebling medal for "meritiorious achievement in mineralogy and allied sciences."

At Cambridge, E. Leon Chaffee, Gordon McKay Professor of Physics and Communication Engineering, announced the solution of the hitherto baffling mathematical problems presented by power vacuum tubes. The discovery climaxed ten years of research.

Morison Honored

For his book, "History of Harvard College," Samuel E. Morison '08, professor of History, was awarded the Jean Jules Jusserand medal at the fifty-second meeting of the American Historical Association in Philadelphia last week.

William Y. Elliott, professor of Government and Gaetano Salvemini, Lauro de Bosis Lecturer on the History of Italian Civilization, addressed the delegates.

Powell Urges Court Restriction

Before the national convention of the American Political Science Association in Philadelphia last week. Thomas R. Powell, Langdell Professor of Law, predicted some curtailment of the Supreme Court's role in constitutional interpretation in the near future.