Nature of the so-called Elements. 103 
I said “another,” or “others,” because I was not then able 
to determine whether the last named lines proceeded from the 
same or different molecules; and I added that it was possible 
we might have to wait for photographs of the spectra of the 
brighter stars before this point could be determined. 
I also remarked that this result enabled us to fix with very 
considerable accuracy the electric dissociating conditions which 
are equivalent to that degree of dissociation at present at work 
in 
cells. e@ sam h . a 
when a coil and small jar are employed. 6. The spectrum when a large coil 
and large jar are used. 7%. The absorption of the calcium vapor in the Sun. 
Hon 
In fig. 3 I have collected several spectra copied from photo- 
graphs in order that the line of argument may be 
irst we see what happens to the non-dissociated and the 
dissociated chloride. Next we have the lines with a wea 
voltaic arc, the single line to the right (W. L. 4226-3) is much 
thicker than the two lines (W. L. 3983 and 3968) to the left, 
and reverses itself. 
We have next calcium exposed to a current of higher ten- 
sion. It will be seen that here the three lines are almost 
equally thick, and all reverse themselves. 
ow it will be recollected, that in the case of known com- 
pounds the band structure of the true compounds is reduced 
as dissociation works its way, and the spectrum of each consti- 
tuent element makes its appearance. If in 3 we take the wide 
line as representing the banded spectrum of the compound, and 
the thinner ones as representing the longest elemental lines 
