Modern Setting for Caracas Meeting -- Ultra-modern design features the auditorium in which western hemisphere delegates will meet March 1 in Caracas, Venezuela, for the 10th Inter-American Conference. Hanging panels provide an ingenious acoustical system carrying sound to all parts of the auditorium in equal volume. Each seat has a dial phone on which delegates can tune in on the language translation desired. The U.S. delegation will be lead by Secretary of State John Foster Dulles. February 27,