1878.] Mr. J. N. Lockyer on Researches in Spectrum Analysis. 279 



Paris 1878. Cours de Physiologie Generale du Museum d'Histoire 

 Naturelle. Le9ons sur les Phenomenes de la Vie. 8vo. 1878. 



The Family of the late C. Bernard. 

 Brodie (Rev. P. B.) Fossil Lepidoptera. 8vo. Warwick 1877. 



The Author. 



" Researches in Spectrum Analysis in connexion with the 

 Spectrum of the Sun." By J. N. Lookyer, F.R.S. Received 

 November 17, 1877. Read January 24, 1878 * 



In a map of the solar spectrum, containing a greatly increased 

 number of lines, such as that upon which I am now engaged, it is 

 possible to seek under favourable conditions the coincidence or non- 

 coincidence of lines due to elements hitherto undetected in the solar 

 atmosphere, on account of their existing in quantities insufficient to 

 give very marked spectral lines. 



A search has accordingly been made, on the principles laid down in 

 previous communications, for those elemeuts which contain in their 

 spectra long and well-characterised lines in the photographic region. 



Although the evidence cannot be said to be complete until the whole 

 spectrum has been examined, it is not too early to adduce the following 

 evidence as to the existence of several additional metals in the sun's 

 reversing layer, and the probable existence of others. 



The results obtained up to the present time are shown in the follow- 

 ing tables, premising that in the first paper of this series the metals 

 considered as being solar as the result of the labours of Kirchhoff, 

 Angstrom, and Thalen, together with the considerations there brought 

 forward regarding the length of the lines, were as follows : — 



Na 



Fe 



Ca 



Mg 



Ni 



Ba 



Cu 



Zn 



Cr 



Co 



H 



Mn 



Ti 



Al 





See ante, p. 49. 



f "Phil. Trans.,' 5 1873, p. 253. 



