June, page 13—In the letter from Jean Piquette, equation 3 should read:
τ=(αβ)1/4{ln|T+(α/β)1/4T−(α/β)1/4|+2 tan−1[(β/α)1/4T]}TnTV

October, page 26—The French laboratory that missed making the discovery of neutrons should have been identified as that of Irène Curie and Frédéric Joliot. In the same article, the codiscoverer of H3+ molecular ions should have been given as Henry Eyring. The editors regret the errors.

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