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In This Issue

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Articles:

• "Francis Perrin’s early-1939 analysis of uranium criticality: a look back," by Cameron Reed

FHP Essay Contest Winners

April 2019 Session Reports:

• "Secrecy and Espionage in Science," (FPS co-sponsor)
• "Remembering Julian Schwinger," (DPF co-sponsor)
• "Centennial of the Eddington Eclipse Expedition," (DGRAV co-sponsor)

March 2020 and April 2020 FHP Sessions

Book Review:

• "The Oxford Handbook of the History of Modern Cosmology," by Helge Kragh and Malcolm Longair, by Cormac O’Raifeartaigh

Officers and Committees

The articles in this issue represent the views of their authors and are not necessarily those of the Forum or APS.