From the Sister Klaryta Antoszewska Photograph Collection (PH-00352). The slide reads: "Comparison of the cumulative estimated dose with diagnostic x-rays 1951 to 1958.

From the Sister Klaryta Antoszewska Photograph Collection (PH-00352). 

From the Sister Klaryta Antoszewska Photograph Collection (PH-00352). 

From the Sister Klaryta Antoszewska Photograph Collection (PH-00352). 

Typed onto a piece of paper attached to the image: "Howard Hughes walking along a hall at the State Department. Left to right: Jesse Jones, Howard Hughes, Harold Brayman, President of the National Press Club. July 1938."