An Unusual Optical Phenomenon

@article{GledhillAnUO,
  title={An Unusual Optical Phenomenon},
  author={J R Gledhill},
  journal={Nature},
  volume={14},
  pages={29-29}
}
THIS morning, a little after nine o'clock, the ordinary solar halo, radius about 22°, was seen. It was bright, and the red very distinct.