in the library of the new Columbia Alumni Center on 113th Street, the past is always present: More than a century’s worth of yearbooks and assorted histories, arranged in wood-and-glass cabinets, provide the backdrop for rotating exhibitions of Columbia memorabilia. The inaugural exhibition, open through October 23, features 1930s covers from Jester, Columbia’s student humor magazine, along with other material from the collection of Paul Neshamkin ’63CC. Also on view are photos and artifacts from the Columbia University Archives, including artwork by Paul’s father, Oliver Neshamkin ’35CC, ’37GSAS, who was involved in both Jester and the Spectator.