Phil Mag S 4 Vol 49 PI 11 



THE CITRON RANGE OF THE SPECTRUM, APPROXIMATELY. 



REPRESENTED FROM EYE SKETCHES ONLY. 



NUMBERS FOR 



1000 1100 1200 1300 ItOO 1500 1600 1100 l8 00 - .300 





! 1 1 1 1 1 1 1 1 1 





. 1 1 1 1 1 1 1 1 1 : 1 1 1 1 1 1 [ 



NUMBERS FOR 



5900 5800 5700 5600 5500 5+00 5300 5200 5100 5000 





























Mi 1 i 1 1 



1111:111! 



1 II III! 



1 1 I ii 1 1 1 1 



fill i I 1 I 



1 1 1 1 i 1 1 1 1 



1 1 1 1 ! 1 II 1 



! U 1 f 1 TT 



1 1 1 1 1 1 1 1 1 





FTrTo 



\ 















sUld 





OR 



IMS-I 















£-5269 



?™s 





TABULAR SOLAR 

 SPECTRUM. 



















r 



NIGHT REFERENCE 

 Blow- pipe Hame + 

 Sodium Chlor.de. 



s,s f -t 







C 1 T 



RON B 



AND 







GREEN B 



1ND 



1 







!5 \ 



.&. 5 i 35 



?.., «l. 







5l 6S , S, S2 





. 







1 



\ k 









fet 







Li 





1 



1 ii 



Wmty* .... 







hi 



,„,.,.. 



TERRESTRIAL 

































j 







[ 







SOLAR 

 CORONA 





1 

























5322 





fr„m,ns Eclipse Obser.en, 



"m lei's "i "(SO 





Si 





-. i 







r 1 









FAINT TWILIGHT 









































ii 





















:: 









. 











BORACIC ACID, 

 BORON 





!! Bono 



z 







Boron (X, 





Boron 





Boron y 













5,86 













































BEL 



„M 



ChloHd^V 











fi'\ F 





















.J^tTL 





















m 













uL 







IfUf. 



m 













Blow- p.p. flame 





!! 





















!! 





5«7 







53^9 















j 









:: 



.— i 



-^ 















BARIUM 































9»l 





















1 















S. 







L - ; | - 











- T '" 



Blow- pip. fi™. 





ii 



















































. 







, 





ii 



i : 







■ :, -^ 



WAVE-LENGTHS in 



.1 — i — i i i i i i i | i i i i i i i i i j i i i i | i i i i j i i i i | i i 



000O 23 00 0000 2200 „ 0000 2,00 0000 2000 



Mmterr, tiros hth 



