A student of the apparent ideological split between the Soviet Union and Communist China will speak this afternoon in the first of the Thursday afternoon lecture series.

Immanuel C. Y. Hsu, associate professor of History at the University of California at Santa Barbara, will lecture at 4 p.m. in the air-conditioned Allston Burr Lecture Hall B. He will talk on "Sino-Soviet Ideological Vicissitudes," the innovations in Red Chinese ideology and the more recent disputes between Russia and Red China.

A graduate of Yenching University who received his doctorate from Harvard in 1954, Hsu is also Chairman of the East-Asian Studies Program at Santa Barbara. He is the author of Intellectual Trends In the Ch'ing Periods and China's Entrance In the Family of Nations.

POETRY READING

Sean O'Criadain, Irish Poet, will give a reading of his own works at 4 p.m. in the Lamont Forum Room. The reading is the first of a series of five reading to be given every Wednesday through August 9.

A native of Cork, O'Criadain has edited Botteghe Oscure, an Italian Literary Review published in Rome and has translated T. S. Eliot "The Wasteland" into Gaelic.

BRATTLE FORUM

A group of prominent political scientists will discuss "Crises in International Organizations" at the second Brattle Street Forum of the session. The discussion--to be televised later by Channel 2--will be in the Loeb Experimental Theatre, Tuesday, at 4:30 p.m.

George E. Gordon Catlin, Bronman Professor of Political Science at McGill University, will be among the participants. With him will be Henry A. Kissinger '50, associate professor of Government.

Kissinger, author of Nuclear Weapons and Foreign Policy and The Necessity for Choice, is a special, part-time advisor to President Kennedy on foreign policy and military planning. Kennedy reportedly was impressed with Kissinger's latest book and placed it on the required reading list of his subordinates.

Karl W. Deutsch, prominent political scientist from Yale University, will also participate. Also on the program are Lincoln P. Bloomfield, associate professor of Political Science at MIT, and John N. Plant, instructor in Government at Harvard and student of Latin American affairs.