A female student sits with her dog while other students busily man the phones behind her. Tribune caption reads, "During the second `mill-in' in as many days at the University of California yesterday, the Dean of Students office (below) was again jammed with youths protesting students suspensions. They also lined the top of neo-classic Sproul Hall (above), and sat in a corridor under the gaze of a portrait of Robert Gordon Sproul. One girl even brought her dog. See story on page 1.