Cinema 16 was a New York-based, membership-funded film screening society programmed and operated by Amos Vogel and his wife, Marcia, from 1947 to 1963. Famed for the daring and diversity of its cinematic bills of fare, which combined avant-garde, narrative, documentary, educational, and animation films, sometimes on the same program, Cinema 16 was one of the single most important incubators for the American underground film scene, at one point boasting almost seven thousand dues paying members. The images below, provided by Paul Cronin, editor of Be Sand, Not Oil: The Life and Work of Amos Vogel, offer a sampling of Cinema 16 membership applications signed by certain noteworthies, some perhaps predictable (Sontag), some unexpected (William F. Buckley, Jr.?), and give some indication of the cultural eminence that this remarkable cine-club enjoyed during its heyday.