“ Other meteorological phenomena caused by the diffraction of light include the anthelia, and the chromatic rings seen encircling shadows thrown on a bank of clouds, mist or fog. These appearances differ from halos and coronae inasmuch as their centres are at the anti-solar point; they thus resemble the rainbow. The anthelia (from the Greek ἀντί, opposite, and ἥλιος, the sun) are coloured red on the inside, the outside being generally colourless owing to the continued overlapping of many spectra. The diameter increases with the size of the globules making up the mist. ”

“ Krakatoa) , are also explicable by the diffraction of light. (See Dust.)
See E. Mascart, Traité d’optique (1899–1903) ; J. Pernter, Meteorologische Optik (1902–1905) .
In architecture, the term “corona” is used of that part of a cornice which projects over the bed mould and constitutes the chief protection to the wall from rain; it is always throated, and its soffit rises towards the wall. ”