Fine Group of Sun-spots

@article{DenningFineGO,
  title={Fine Group of Sun-spots},
  author={W F Denning},
  journal={Nature},
  volume={42},
  pages={456-456}
}
THIS morning I saw a very large cluster of spots in the sun's northern hemisphere, and nearly at mid-transit across the disc. The group is elongated east and west, and there is a fine spot at each of the extremities. The length of the group is about 113,000 miles; it exhibits a very complicated structure, and I have made a drawing of it with some difficulty… CONTINUE READING