416 Scientific Intelligence. 
respectively as 590°53 and 589°88, that of the yellow line is 58827 
in millionths of a millimeter; it corresponds to the division 1016°8 
of Kirchhoff’s scale— Comptes Rendus, \xviii, 320, Feb. 1869. 
h 
On the 6th January the bands were seen upon the full disc of the 
sun, but were found to arise from a cirrhus in front of the tele- 
scope and disappeared with the cirrhus itself. Secchi remarked 
that under these circumstances the bands due to the neighborhood 
of the solar spots were sensibly increased in intensity. y study- 
ing the region near D with a spectroscope of nine prisms the 
author found that the yellow ray of the protuberances really ex- 
ists in the sun and may be recognized far from the border. The 
pots, 
‘The author has also examined the spectrum of Sirius to deter 
mine whether there is any displacement of the hydrogen lines due 
toa proper movement of the star, a question already examined b 
Mr. Huggins, With a spectroscope of four prisms the ray F was 
observed to be sensibly displaced, the displacement of the center 
being sensibly equal to the breadth of the rays D’ D” of sodium 
and being toward the less refrangible side. With a ese 
of two prisms the displacement of the hydrogen rays # a0 : 
with respect to the rays C and F of Sirius was also observed and 
in the same direction. It is now well known that the bright lines 
in the nebule are due to hydrogen and nitrogen, but as nitrogen 
r different orders it was interesting to de 
to which of them the bright green line belongs. By dé 
co 
spectrum.— Comptes Rendus, |xviii, 358. W. G 
