270 
CAPTAIN W. DE W. ABNEY AND DR, A. SCHUSTER 
Lines seen in the corona. 
4526 
4501 double (?) 
4473 
4442 
4414 
4401 short 
4395 
4370 short and winged 
4340 H 7 
4289 
4267 
4252 
4241 
4224 
4212 
4195 
4179 
4173 short 
4168 
4101 h 
4085 
4067 
4057 
4044 
4015 comparatively strong 
3992 
3948 
Conclusion. 
In conclusion we may briefly review the principal results we have obtained. 
The direct photographs of the corona are chiefly of interest in connexion with 
previous and future eclipses, and we believe that those obtained will be found of 
value, as they have been taken during a time of sunspot maximum ; as they extend 
further than any photographs previously obtained, and as the position of the corona 
has been fixed by their aid to within a fraction of a degree. 
The photograph taken with the prismatic camera is of importance when we come to 
compare spectra of different prominences, which are found to give lines with different 
relative intensities, caused no doubt by differences of temperature. Two prominence 
lines in the ultra-red have been discovered. It is also proved that the green line of 
the corona is a line specially belonging to the corona, forming a distinct ring round a 
large part of the solar disc, whilst it is only very faintly present in the promin¬ 
ences. A faint ring corresponding to D 3 is also seen. 
The photograph of the spectrum of- the corona and prominences has yielded an 
abundant harvest. Twenty-nine lines of one prominence have been photographed, 
and the great importance which the metal calcium plays in the solar eruptions has 
been brought to light. Other lines, well known hitherto as chromospheric lines, but 
not traced in the prominences, are now shown to belong to them also, and a number 
of unknown lines, especially in the ultra-violet, has been added to the list. 
As regards the corona, we may perhaps point out that hitherto the position of only 
one true corona line had been fixed, though two other lines had been suspected. The 
corona, during the late eclipse, seems to have been especially rich in lines. Thollon 
observed some in the violet without being able to fix their position, and Tacchini could 
determine the position of four true corona lines in the red; from the photograph we 
