Results from the Volcano Ranch experiment showed that the cosmic-ray intensity decreases smoothly with energy from 10 - 10 electron volt. and that primaries in this range arrive isotropically. Of particular significance was the detection of a single particle whose energy of 10 electron volt is larger than the maximum that could be contained in the galactic disc by galactic magnetic fields. Particles of these energies can only originate in the galactic halo or from beyond the galaxy, and their existence is not consistent with the Greisen-Zatsepin-Kuzmin limit.