5()g TABLE 520.— DISPERSION OF KERR EFFECT 



Field 



Mirror cgs .41/4 .44# .48tt .52/* .56,u .60/t .64/t .66tt 



Iron 21,500 —.25 -.26 -.28 —.31 -.36 -.42 —.44 -.45 



Cobalt" 20,000 -.36 —.35 —.34 -.35 -.35 —.35 -.35 —.36 



Nickel 19,000 —.16 -.15 —.13 —.13 —.14 —.14 —.14 -.14 



Steel ' . . 19,200 —.27 -.28 -.31 —.35 —.38 -.40 -.44 —.45 



l nvar 19,8C0 —.22 —.23 —.24 -.23 -.23 —.22 —.23 -.23 



Magnetite 16,400 -.07 -.02 +.04 +.06 +.08 +.06 +.04 +.03 



Bismuth 



+ 14.5°C +104° 125° 189° 212° 239° 259° 269° 270° 



5.28 2.57 2.12 1.42 1.24 1.11 .97 .83 .77* 



* Melting point. 



SMITHSONIAN PHYSICAL TABLES 



