MR. J. G. LEATHEM ON THE THEORY OF THE 
1 14 
of magnetisation is not stated, this series of experiments gives no information as to 
the value of Go- 
Polar Reflection from Nickel. Yellow Light, yo = 
Angle of 
incidence. 
Calculated value of 
+ 180° - .T. 
Zeem.\n’s observed 
value of 
m - 180°. 
+ m — X. 
.50" 
268° 38' 
11° 40' 
280° 13' 
shewing agreement if x = 79° 47'. 
The experiments quoted in the two following tables are from a paper of Zeksiax’s 
(‘ Communications from the Leiden Laboratory of Physics,’ No. 10) ;— 
Polar Pteflection from Nickel. White Light, — 2190 C.G.S. 
Angle of 
Calculated value of 
Observed value of 
■?; 4- Ttl — X. 1 
incidence. 
d-i — X. 
m. 
25° 
276° 13' 
5° 9' 
281° -22' 
39° 4' 
272° 43' 
9° 17' 
282° 
shewing; agreement x = 78° 19'. 
O O 
Polar Reflection from Nickel. White Light, yo— 2190 C.G.S. 
Angle of 
• incidence. 
Calculated Aurlue of 
logic (-/''■) -^ogioL'. 
Zeeman’s observed 
value of 
10"’ X /t. 
/Calculated value of 
\ Observed value of n ) 
39° 4' 
T-2940 
- -975 
•201-8 
25° 
T3000 
- 1-00 
199-5 ! 
wherein L' — 2cX (— Cq) 
The agreement indicated is excellent, provided Cq have such a value that 
r' — 1 
— 2 0 0 > 
log (- Cq) = 12-9649 
- Cq = 9-225 X 10-1' 
namely, 
