j-Hop Concludes Semester Exams j* * . •At the UniversityAXN ARBOR, Mich.. Feb. ll.—University of Michigan students jturned their attention today to the j J-Hop, biggest social event of the j campus season. jThe J-Hop, which concludes the' first semester examination period, j will be held tonight in the intramural sports building amid a modernistic setting. jFrom 20 p. m. to 3 a. m. whirling feet wiH tap out a kaleidoscopic pattern as two dance orchestras (Jimmy Dorsey and Kay Kyser) play without interruption.More than 1,500 couples from a score of states will attend the dance.Gov. Frank Murphy and President and Mrs. Alexander G. Ruth-ven head a long list of patrons and patronesses. The Governor, however. Is in Washington and probably will not attend.