874 Photographic Spectra of Stars. 
small areas of the moon. 
e spectra of Sirius, Vega, a Cygni, a Virginis, 7 Urse 
Majoris, a Aquile and Arcturus are laid down in the map on 
the scale of M. Cornu’s map of the ultra-violet part of the solar 
spectrum, : 
so stellar spectra extend from about G to O in the ultra- 
violet. 
white stars coincident with these lines. A glance at the oe 
will show how remarkable is the arrangement in position © 
these twelve typical lines. They forma great group in which 
that such modifications would confirm his views on the dissociation of this ne 
nee, erence is also,made to Proceedings R. S. December, 1878, fig: 2“ 
where Mr. Lockyer gives a fuller statement of his views on this and other po! 
in connection with different classes of spectra of the stars. 
