THE EDGE OF SCIENCE — BROWN 



403 



10 



,24 



10 



,22 



ARCS y ^ 



10 



20 





O 

 1 — I 



o 

 > 



H 



CO 



:z; 



w 



Q 



:z; 



O 

 or; 

 H 



a 



w 



U4 



10 



18 



10 



16 



10' 



,14 



HOLLOV CATHODE 

 LOW PRESSURE ARCS 



THERMONUCLEAR FUSION 

 EXPERIMENTS 



^i 



/A 



FLUORESCENT LAMPS 

 GLOW D1SCHAR.CES 



neon CubQ'L 



- FLAMES f 



50LAR 

 CORONA 



10 



,12 _ 



10 





10 



10^ 



10^ 



10^ 



EARTHS 

 IONOSPHERE 



INTERPLANETAKf 



TYPES OF PlASMAS 



•^'^'^ INTERSTELLAR. 



I I 



10^ 



10^ 



10^ 



10= 



10^ 



10-^ 



10^ 



10^ 



ELECTRON TEMPERATURE 'T(°K) 



Figure 1 



