( 598) 
discovered in the spectra of these three sources of light. Stassano 
9 
has found, that while B of the lines in the spectrum of the Polar 
Aurora must be aseribed to Neon, Argon, Krypton and Xenon, also 
the light of the Protuberances and especially of the Corona greatly 
emanates from the same newly discovered elements of the Zero-group. 
Among the spectral lines, which have been found in the Protuberances 
by DesraNDrrs and Hare, there are, according to STASSANO, 44 which 
belong to this Zero-group and nearly all the 339 corona lines, photo- 
graphed by Humpareys during the eclipse of 1901, are also lines of 
this group.*) And so it is the same elements which (according to 
me also for the same reason) cause the same light to shine on the 
outside of the sun and the earth. 
If there is therefore great reason to take Hare's “Solar Vortices” 
for Solar Aurorae, the configurations and the motions of the hydrogen- 
floeculi in these Vortices do not at all clash with the improbability 
of the existence of material vortices. 
For these flocculi then agree with the electric light configurations 
of our Polar Auroras and like these they will move without any 
change in the place of the molecular matter. 
Hatr’s Solar Vortices instead of weakening my idea about the 
rest of the sun, give on the contrary unexpectedly a splendid 
support to this idea. For they help to remove the principal 
objection, which has always wrongly been raised against this idea 
and has been derived from the shifting of the spectral lines. 
For if, for the many reasons developed above, we consider these 
Vortices as Aurorae, they lead us to the conclusion that, although 
a gas is at rest, yet it will show shifted spectral lines, if only it 
contains enough ions rapidly moving in the line of sight. The 
correctness of this conclusion, at which, on other grounds also 
ScuusteR has lately arrived,*) was a few years ago experimentally 
proved by Srark, when, in examining the light of hydrogen in the 
Essai is also illustrated the characteristic change of shape of the corona with the 
period, and the rays of the corona are not taken for real eruptions (as SCHAEBERLE 
does), but for luminescences, analogous to the rays of the Polar Aurora. In my 
Essai (p. 84—88) has also been treated the repartition of the Protuberances, little 
agreeing with the repartition of visible spots. Openings, too small to be seen as 
spots throw out nevertheless their bundles of rays which form their Protuberances. 
If now these openings, as my theory tries. to demonstrate, are smallest at a latitude 
from 60 to 65°, then with that the constant minimum of the Protuberances at 
this latitude is explained too. 
1) ARRHENIUS: Lehrb. d. Kosm. Physik. p. 911. 
3) ScHUSTER: Nature 29 Oct. 1908. 
