

] 



> 





AURORA A 



ND AIR TUBES &.c 





PM Mag. S. 4. Vol .49. PI .V 



AURORA 





w^L 



JsusJll 



z 



9 10 



llll Mill Ill II 



11 



Kill llll Villi 



i I in I i I n i i in 



1 1 llll III 



Mil 





Al R 







1 'ill U 



in in in in 1, liii 



mi 



in 



11 





i 



AIR 

 VIOLET POLE 





: 111!' 



' it 



III III 



It I 



11 111. Ill 







2 



RED POLE 



mmmm ij if ■ ; : , t ■ ■ 



!,, l' ; 1 11 I J 1 



3 



111 HI III 1 ! 



in 



il* in 



1 



! 



i 



3 





+ " ! 1 . — ^ — . L— 



& — . .. — *— , 1 









AURORA 

 TUBE 



\ 11 MM 



II 1 



■ 







4 



PHOSPHORESCENT 

 TUBE 



;;ii!;!!;;!; : .!:; 1 1 : .: ; 1 . ! ■ ' , . 1 , . : 



Mi. ' 1 .;. .1 



J nil 







5 



AIR SPARK 



zffljLii mi 









6 



AIR SPARK 



OVER WATER 



J UQ 



i ill, il 



il, 13 







7 



