Howe, Herbert A. (Herbert Alonzo), 1858-1926 · Meadville, Penna., Flood and Vincent · leaf 203
The spectra. 196 A Study of the Sky. Filaments. stance which causes it. Other lines reveal the presenceof hydrogen and helium. Whence are these curious interlacing filaments of theinner corona, and the outstretched wings of the outer … Fig. 99.—The Corona of April, 1893. Dark rifts. corona ? Why are dark rifts seen in certain places, as ifthe corona had been cleft by a gigantic cleaver from itsoutermost boundaries straight down to the solar surface?How are the materials composing the corona upheld The Sun. 197 against the…
Astronomy
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