CHROMOSPHERE (from Gr.
The chromosphere adds the three last of the list.
within the free surface, whereas the chromosphere is of an average thickness of 5000 m., and attains that temperature only at its base.
This was afterwards identified with the D3 line of the solar chromosphere, observed in 1868 by Sir J.
In the higher chromosphere the following were recognized: helium and parhelium, hydrogen, strontium, calcium, iron, chromium, magnesium, scandium and titanium.