The corona was photographed at Konigsberg during the totality of the 28th of July 1851; similar records of the red prominences, successively obtained by Father Angelo Secchi and Warren de la Rue, as the shadowtrack crossed Spain on the 18th of July 1860, finally demonstrated their solar status.
The photography of prominences was, after some preliminary trials by C. A.
Including prominences, spots, faculae and flocculi, and p even the eleven-year period.
This envelope is also sharply defined, but its normal appearance is compared to the serrations which blades of grass show on the skyline of a hill, and it is disturbed by the outbursts, called prominences, of which details are given below.
Adams make its direction downwards; but round the rim and on bridges the characteristic distortions due to eruptive prominences are often observed.