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). 

A view of the first passenger plane equipped with radar that Howard Hughes is flying in Culver City, California.

Arrangement note: Series I. Demonstrations, Subseries I.B. Other Demonstrations and Strikes

Photograph of Grover Whalen, Howard Hughes, and Al Lodwick during a parade procession for the completion of Hughes' Round-the-World flight. Typed onto a piece of paper attached to the image: "Howard Hughes riding up Broadway - waving to throngs. 7/15/38."