The Heavens Above: A Popular Handbook of Astronomy

by J. A. Gillet; W. J. Rolfe

Fig. 226.

Fig. 226 shows the corona of 1860 as it was observed by Temple.

Fig. 227.

Fig. 227 shows the corona of 1867. This is interesting as being a corona at the time of sun-spot minimum.

Fig. 228.

Fig. 228 represents the corona of 1868. This is a larger and more irregular corona than usual.