The attempt by F. Reines and others to detect high‐energy neutrinos from outside the earth's atmosphere has yielded seven counts that the experimenters believe represent the particles they are looking for. The experiment is housed 3200 m underground in the East Rand Proprietary Mine near Johannesburg, South Africa, and is a cooperative effort of Case Institute and the University of Witwatersrand. It uses a large‐area (110 m2) scintillation counter to record muons produced by interaction of neutrinos with the surrounding rock.

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