7 images. Atomic exhibition, 21 June 1952. Mary Howard - 15 years (on Van de Graff generator); Mrs. Sam Williams; Tom Mawhinney (with Geiger counter); Jack Aldridge (demonstrating a dime irradiator).; Caption slip reads: "Photographer: Mitchell. Date: 1952-06-21. Reporter: Adler. Assignment: Atomic exhibition. 26: Group of people in front of exhibit showing gaseous defusion method of separating uranium 235. 27: Mary Howard, 15, on Van de Graff generator, her hair standing up straight -- with John Rutherford demonstrating. 28: Mary Howard, 15, on Van de Graff generator, with her hair standing up straight."