A huge ionization spectrometer using image intensifiers to record electromagnetic cascades is operating at the Louisiana State University Cosmic Ray Laboratory near Climax, Colorado. Richard W. Huggett, speaking at the eleventh International Conference on Cosmic Rays at Budapest in August, said that the apparatus will measure ultra‐high energy (about 1013eV) hadronic interactions. (His collaborators were Harry Coxell, C. Richard Gillespie, David R. Humphreys and P. Kevin MacKeown.)

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