This undated photograph shows the hands of a technician manipulating the specially designed "Carrel flask" and the aspiration device Carrel designed in the 1920s and widely used into the 1950s. Courte..
This undated photograph shows the hands of a technician manipulating the specially designed "Carrel flask" and the aspiration device Carrel designed in the 1920s and widely used into the 1950s. Courtesy of The Rockefeller Archive Center