Volume 1, Issue 1 contains 25 Letters, including "Rest Mass of the Neutrino" by J. J. Sakurai, "Element No. 102" by A. Ghiorso, T. Sikkeland, J. R. Walton, and G. T. Seaborg, and "Instability, Turbulence, and Conductivity in Current-Carrying Plasma" by O. Buneman.