Columbia University [Professor working with bright light.]
Columbia University [Person holding a bright light.]
Columbia University [Science professor performing an experiment.]
Columbia University [Man holding a bright light.]
Columbia University [Sculpture professor.]
Columbia University [Professor pouring a solution over burning paper.]
Columbia University [Professor talking with student.]
Columbia University [Science professor.]
Columbia University [Professor with a student.]
Columbia University [Three professors.]
Columbia University [Students in a professor's office.]