Sulphur containing selenium, such as occurs in the isle of Vulcano in the Lipari Isles, may be orange-red; and a similar colour is seen in sulphur which contains arsenic sulphide, such as that from La Solfatara near Naples.
They are seven in number - Lipari (Lipara, pop. in 1901, 15,290), Stromboli (Strongyle), Salina (Didyme, pop. in 1901, 4934), Filicuri (Phoenicusa), Alicuri (Ericusa), Vulcano (Hiera, Therasia or Thermissa), the mythical abode of Hephaestus, and Panaria (Euonymus).
Vulcano, 2 m.