• X-ray machine 

        Author(s):University of Colorado Medical Center. Division of Visual Education; University of Colorado Medical Center. School of Nursing
        Date:1930-1940
        Format:Photograph
        A physician inspects the X-ray machine.
      • X-ray machine 

        Author(s):Colorado Agricultural College
        Date:undated
        Two assistants hold a dog in place on a table, below a metal globe object (x-ray machine), while a professor [Dr. Kingman] looks on.