KNOWLEDGE OF THE SUN — ST. JOHN 



187 



gram of a verticul section. (Fig. 2.) This represents the results 

 of observation interpreted in accordance with the idea of levels of 



SUGGESTED SCHEME OF THE SUN'S ATMOSPHECL 

 D15TCI5UT10N OF FACTORS ACCOePlNG TO LEVEL 



COMPOSITION 



Ca + 

 h-* K LINE5) 



HYDC06EN 

 H a 



CURBtNTS 



5P0T5 



J.. 9 

 Km 







Z.O 

 V^y Km 



HYDCO&EN 

 Hp> 



Ti*X3fo65 



SODIUM D,,Dj 



NEUreAL (AKIUM 



AL IS -20 



Fc 15-40 



Fc 10 



Fe 4 

 Fc 00 



l.OKm 



0.5 Km 



O.e Km 



0.1 Km 



V\bK 



0.5 Km 



0.0 Km 

 0.2 Km 



0.1 Km 

 -> l.O Km 



PRESSURE 



iO"'^ATM 



COT AT ION 

 0° -45* 



V =2.l5Km 



^* 14.65 

 Y = e.09Km 



HEIGHT 



I^.OOOKm 



jO.iKm 



O.OKm 

 to 3K 



IO"*ATM 



i = 14.44 

 V =2.0feKm 



10 ATM 



5 = 13.64 



aoooKm 



fe.OOOKm 



e. 300 Km 

 e.tOOKm 



.500Km 



.OOOKm 



40OKm 

 2 75 Km 



\N >,o -^^*>^;^• ^"-^^''^;: c^^PH0T05PHEeic^'^LAYEeC';.;4cV:^^ 



Miirj:i,a::,i;:i!,ii)i'ii|iVi!';!ii|^i:i.nK^,iri,i^Vtl'riii 



;lNTERlOCfeil6UNli|l|,|| I I 



I'lilM II 



FmuitB 2 



origin of Frannhofer lines, an idea originally suggested by Lockyer 

 and later introduced independently at Mount Wilson. The first 

 column shows certain typical chemical components at various levels. 



