[July, 1891.] 



THE 



SCIENTIFIC TRANSACTIONS 



OF THE 



ROYAL DUBLIN SOCIETY. 



VOLUME IV. (SERIES II.) 



XI. 



ON THE CAUSE OF DOUBLE LINES AND OF EQUIDISTANT SATELLITES IN 

 THE SPECTHA OF GASES. By GEOEGE JOHNSTONE STONET, 

 M.A., D.Sc, F.R.S., Vice-President, Royal Dublin Society. 



DUBLIN: 



PUBLISHED BY THE EOYAL DUBLIN SOCIETY. 



LONDON: WILLIAMS AND NOEGATE. 



PRINTED AT THE UNIVEESITY PRESS, BY PONSONBT AND WELDRICK, 



PEINIEES TO IHE SOCIETT. 



1891. 



