34 Mr. J. N. Lockyer. Comparison of the Spectra of [Dec. 19, 



[On November 25, the spectrum of 1st Cygnus was observed by 

 Mr. Fowler, and again lie found a coincidence with the carbon fluting 

 at 468 — 474. The observation was confirmed by Mr Baxandall. — 

 December 9.] 



Other evidence of carbon flutings was shown by slight rises in 

 Vogel's light-curves near 517 and 564. These, however, could not 

 be as well seen as the band in the blue, because they fall on the 

 bright continuous spectrum from the meteorites. In the stars in 

 Cygnus, Mr. Fowler detected brightenings near 517, and in 2nd and 

 3rd Cygnus, perfect coincidences were found with the fluting at 

 517 in the spirit-lamp flame. In this case both 517 and 468—474 

 were simultaneously seen to be coincident with flame-bands. 



[In the observation of November 25, carbon 517 was also found in 

 1st Cygnus.- — December 9.] 



Measurements were made of the brightenings in the spectrum of 

 7-Cassiopeiae by Mr. Fowler on September 18th, and these were also 

 found to be coincident with the carbon flutings 517 and 468 — 474; 

 the citron fluting at 564 was not seen. It may be remarked that C, 

 F, and D 3 were seen very bright. 



The conclusions drawn from my suggestions as to the presence of 

 carbon, as well as hydrogen, in bright-line stars,' are therefore 

 strengthened. 



In the following table, all the lines and flutings recorded in bright- 

 line stars, with the exception of 7-Cassiopeiae, are given. The lines 

 recorded by Sherman in <y-Cassiopeia3 have not yet been confirmed. 



Comets. 



Bright-line stars. 



Probable origins. 



X of probable 

 origins. 





4101 



H 



4101 



431 





CH 



431 





434 



H 



434 



468—474 



468—474 



C (hot) 



468—474 



483 





C (cool) 



483 



486 



486 



H 



486 



500 





Mg 



500 





507 



? Cd 



508 



517 



517 



C (hot) 



517 



519 





C (cool) 



519 



521 





Mg 



521 



[527] 



527 



Fe 



527 





540 



Mn 



540 



546 





Pb 



546 



558 



558 



Mn 



558 



561 





C (cool) 



561 



564 



564 



C (hot) 



564 



568 



568 



Pb, Na 



568 



[579] 



579 



Fe 



579 





5872 



?(D 3 ) 





[589 (D)] 



589 



Na (D) 



5889, 5895 





635 



? 





