INORGANIC EVOLUTION 



AS STUDIED BY 



SPECTRUM ANALYSIS. 



BY 



SIR NORMAN LOCKYER, K.C.B., F.R.S. 



Correspondent or THE INSTITUTE OF FRANCE ; THE SOCIETY FOR THE PROMOTION 



OF NATIONAL INDUSTRY OF FRANCE ; THE ROYAL ACADEMY , OF SCIENCE, 



GOTTINGEN ; THE FRANKLIN INSTITUTE, PHILADELPHIA ; THE ROYAL 



MEDICAL SOCIETY OF BRUSSELS ; SOCIETY OF ITALIAN SPECTROSCOPISTS ; 



THE ROYAL ACADEMY OF PALERMO ; THE NATURAL HISTORY SOCIETY OF 



GENEVA ; Member OF THE ROYAL ACADEMY OF LYNCEI, ROME ; AND 



THE AMERICAN PHILOSOPHICAL SOCIETY, PHILADELPHIA; Honorary 



Member OF THE ACADEMY OF NATURAL SCIENCE OF CANTANIA; 



PHILOSOPHICAL SOCIETY OF YORK ; LITERARY AND PHILO- 

 SOPHICAL SOCIETY OF MANCHESTER ; AND LEHIGH UNIVERSITY ; 

 Director OF THE SOLAR PHYSICS OBSERVATORY ; AND 



Professor OF ASTRONOMICAL PHYSICS IN THE ROYAL 



COLLEGE OF SCIENCE, LONDON. 



llon&on 



MACMILLAN AND CO., LIMITED 

 1900 



[All Rights Reserved.] 



