Analytical Study of the Alternating Current Arc. 339 

 Fig. 5. — Intensity of Light from Arc. 



60 



50 



40 



<30 



Length = -63cf 

 Frequency 50' 



See table HA 



20 



• 10 



J L 



Ang/e of Phase 



j I i 



_t 1 1 /• -f 



20 40 60 \\80 100 120 140 160 ISO 200 220 240/ 260 289 .500 S2Q 340 3 



Time 



\ „ 



^ssr# 



7a 



60 



50 



40 



30 



60 



