Vol.. 6, 1920 
PHYSICS: E. H. HALL 
617 
Table 4 : Platinum 
ko = 110 X 10-6; km = 79.3 X IQ-^; do = 0.163; dm = 0.173; (do -^ dm) = 0.95 
o- = 2.67 T ergs/deg. C. 
li q = 1.6 and 5 = 7 and X'o = 117 R, Ci = 45.2 X 10"^ and C = 0.0652 
\k /lOO 
T 
5o 
8\oo 
(S). 
(-) 
X 106 
(^fl)lOO 
X 108 
0O 
flo 
0.070 
2.3% 
0.01 
0.174 
0.235 
-3980 
-4260 
103 
74 
0.170 
0.175 
0.97 
Table 5: Tin 
ko = 105 X 10-«; ^100 72.6 X 10-^; do = 0.157; dm> = 0.145; (^o -^ ^100) = 1.08 
cT= 0.134 r ergs/deg. C. 
If 5 = 1.51 and 5 = 8 and X'o = 234 R, d = 1.97 X 10-^ and C = 0.0466 
0.047 2.3% 0.02 0.208 0.277 
•3210 
3220 100 69.2 0.159 0.147 1.08 
Table 6: Zinc 
ko = 180 X 10-&; y^ioo = 127 X lO-S; = 0.266; ^100 - 0.262; (do ^ ^100) = 1.02 
a = 0.99 T ergs/deg. C. 
If g = 1.55 and 5 = 10 and X'o = 117 i?, d = 11.64 X 10-^ and C = 0.0304 
0.032 1.6% 0.01 0.245 0.331 -2630 -2730 175 123 0.268 0.265 1.01 
Second Group: Metals for which Ki < 0 and K2 = 0. 
Table 7 : Bismuth 
ko = 9.3 X 10-^ km = 646 X lO'^; do = 0.0201; ^100 
o- = -3.2 r ergs/deg. C. 
If g = 1.25 and 5 = 2.8 and X'o = 1170 R, Ci - 
= 0.0161; (do dioo) = 1.25 
122.6 X 10-6 and C = 0.540 
0.528 2.9% 0.10 0.166 
0.190 
11800 
11600 4.28 3.05 0.0200 0.0160 1.25 
Cadmium 
ko = 160 X 10-6; ;^ioo = 112.4 X lO'^; Oo = 0.223; ^100 = 0.216; (do ^ dm) = 1.03 
a = -32.4 r ergs/deg. C. 
It is easy to find values of q, s and X'o that will give the right value for 
; but the value of ^loo that results is much too small. I cannot deal 
satisfactorily with cadmium at present, owing to the very large negative 
value that Bridgman finds for its a, a value which is about ten times as 
great as those deducible from the work of various other investigators 
who have studied the thermo-electric behavior of this metal. See, for 
example, a paper by Dewar and Fleming, Phil. Mag., Vol. 40, 5th Series, 
1895. It is possible that Bridgman has made some mistake in this case. 
