Columbia University [Man in an industrial space.]

Columbia University [Man in an industrial space.]

Columbia University [Man in an industrial room.]

Columbia University [Man smoking.]

Columbia University [Unidentified man.]

Columbia University [Three men in an industrial space.]

Columbia University [Three men in an industrial space.]

Columbia University [Three men in an industrial space.]

Columbia University [Three men in an industrial space.]

Columbia University [Three men in an industrial space.]

Columbia University [Three men in an industrial space.]

Columbia University [Three men in an industrial space.]

Columbia University [Man speaking.]

Columbia University [Three men in an industrial space.]

Columbia University [Three men in an industrial space.]

Columbia University [Man in an industrial room.]

Columbia University [Man working with unidentified scientific equipment.]

Columbia University [Man working with unidentified scientific equipment.]

Columbia University [Columbia University pennant.]

Columbia University [Students talking.]