Solar Changes of Temperature and Variations in Rainfall. 401) 



Polarian. Trocyonian. 



Predominant. Pioto-calcium, Same as Polarian. 

 proto-titanium, hydrogen, proto- 

 magnesium, proto-iron, and arc 

 lines of calcium, iron, manganese, 

 silicumi (I). 



Fainter. The other proto-metals 

 and metals occurring in the Sirian 



v^ genus. 



Aldtlarlan. Arcturian. 



Predominant. Proto-calcium, arc Same as Aldebarian. 

 lines of iron, calcium, manganese, proto- 

 atrontium, hydrogen, siiicium (I). 



Fainter. Proto-iron and proto-tita- 

 nium. 



Antarian. 



Piscian. 



Predominant. Flutings of manga- ! Predominant. Flutings of carbon, 



nese. Fainter. Arc lines of metallic ele- 



Fainter. Arc lines of metallic ele- ' ments. 

 rnents. 



It will be seen that the conclusions arrived at in the former part of 

 the paper as to the different conditions under which the different groups 

 of siiicium lines become prominent verify the order in which the stars 

 were placed on a scale of ascending temperatures. Thus those stars in 

 which Group I occurs prominently are at the bottom, those in which 

 .Groups II and III predominate occupy intermediate positions, and those 

 in which the lines of Group IV are a special feature appear high up in 

 the classification. 



The photographs of the siiicium spectra were taken by Mr. Butler. 

 Their discussion has devolved upon Mr. Baxandall, who has also traced 

 the siiicium lines through the stellar spectra, and assisted in the 

 preparation of the paper. 



" On Solar Changes of Temperature and Variations in Rainfall in 

 the Region surrounding the Indian Ocean." By Sir NORMAN 

 LOCKYER, K.C.B., F.R.S.,and W. J. S. LOCKYER, M.A. (Canik), 

 Ph.D. (Gott). Received October 2G Read November 2i', 

 1900. 



The fact that the abnormal behaviour of the widened lines in the 

 spectra of sunspots since 1894 had been accompanied by irregularities 

 in the rainfall of India suggested the study and correlation of various 

 series of facts which might be expected to throw light upon the 

 subject. 



