College presidential candidates will address the Jefferson Debating and Literary Society at 8 tonight in Jefferson Hall on the West Range. Besides expressing their viewpoints on the Honor System and other pertinent issues, candidates Larry Altaffer, David Broyles, and Gordon Calvert will answer all questions raised by the Society Mr. Altaffer and Mr. Broyles head Scepter and Skull and Keys respectively, Mr. Calvert, past president of the University Party, is running with no support from any organization in the University.