1868.] 



Constitution of the Sun and Stars. 



19 



between G. and C. Kirchhoff used a Ruhmkorff's coil to produce the 

 iron lines ; but Angstrom lias lately compared the solar spectrum with 



and 0083 ' : 4- is accordingly to be read plus one-third of a Xth-metre, and — , minus 

 one-third of a Xth-metre. This goes to about the same amount of approximation as 



o 



the numbers given by Angstrom. 



Wave-lengths of 68 rays of the solar spectrum in VIHth-metres, reduced from 

 Angstrom'' s de term inatio ns. 



P 



G 



E, 



39- 36 

 •72- 



40- 074- 

 •48- 

 •66 

 •75 



41- 04- 



•47 



42- 29+ 

 •53+ 

 •63- 

 •75- 



43- 104- 

 •28 

 •43 

 •86+ 



44- 08+ 

 •18+ 



48- 65+ 

 •76- 

 •95 



49- 22 + 

 •24+ 

 •61 



51- 72 

 •734- 



• -77 

 •88 

 •96+ 



52- 37 

 •70 

 •73+ 

 •74+ 

 •87+ 



53- 20 

 •28 

 •32 

 •44 



36- 

 36- 

 40+ 

 18 + 

 9 

 29- 

 43+ 



82+ 

 24 



9+ 

 12 

 36- 

 18- 

 15 



43+ 

 22 

 10 

 447 

 10+ 

 19+ 

 27+ 



37- 

 211 + 



2- 



4- 

 11 



8+ 

 46- 

 28 



3+ 



1 

 13 

 33- 



8- 



4 



12+ 



So o 



2854.4 



2821-9 



2796-2 



2721-2 



2686-4 



2670-0 



2080-0 



2066-6 



2041-7 



2007-2 



2005-2 



1961-0 



1655-6 



1653-7 



1648-8 



1634-1 



1622-8 



1569-6 



1527-7 



1523-7 



1522-7 



1508-6 ? 



1473-9 



1466-8 



1463-0 



1451-8 



J Co 



II K§ 



° ^ .3 



S ^ ^ ° 



'r a jj o 

 Q 



6 

 6 

 6 

 6 



6/ 

 6 e 



Kg 



5 c; 5c 



6 6; 6c 

 6c 



6 d 

 4 



6c 

 66 

 6/ 



§g\ 



56, 5 c 



5c 



5c 



6c 



6c 



5b 



5b 



5 c 



5 c, 5 c 

 5 b, 5 c 



Remarks. 



Ca. 

 Ca. 



Unknown ; strong. 

 Fe; strong. 

 Fe ; strong. 

 Fe; strong. 



H ; very strong. Lately ascer- 

 tained to be a fourth Hydrogen 

 line. 



Double. 



Ca ; double line. 

 Fe. 

 Fe. 

 Fe. 

 Fe 

 Fe 

 IX: 

 Fe 

 Fe 

 Fe 

 H 

 Fe 



; wmged. 

 winged; broad, 

 winged ; very broad, 

 winged ; very broad, 

 winged. 



winged, 

 double. 

 Fe; double. 

 Fe. 



Fe ; winged on one side. 

 Fe ; with wings of intensity 6. 

 Fe ; Mg ; winged on one side. 

 Fe ; Ni ; winged on one side. 

 Mg ; winged. 

 Mg ; winged. 



double like E. 



Co. 



1 Interval between E 2 and 

 Ca, J E x •= 1 -07 Xth-metres. 



Fe; 

 Fe. 

 Fe; 

 Fe 

 Fe, 

 Fe. 

 Fe. 

 Fe. 



Fe ; double line, closer than E. 

 Fe ; double line like E. 



