Voiv. 6, 1920 
PHYSICS: E. H. HALL 
619 
TabIvE 14: Ai^UMiNiUM 
Fourth Group: Metals for which Ki < 0 and K2 > 0 
ko = 380 X 10-6; y^ioo = 265 X lO-^; d° = 0.477; dm = 0.492; (d° -^ dm) = 0.97' 
a = (-0.016 T + 0.006 tT) ergs/deg. C. 
If q = 1.45 and 5 = 5.5 and X'o = 125 R, C2 - 6.35 X lO^^, Ci = -3.04 X 10-^ 
C = 0.0886 
(-') 
\k / 100 
7 
5o 
5ioo 
\dTjioo 
(^a)o 
X106 
^0 
^100 
Bo 
Oioa 
0.089 
11% 
0.011 
0.140 
0.187 
-4150 
-4170 
346 
241 
0.479 
0.449 
1.07 
^ Lees found ^is = 0.524 in this metal; but apparently he did not determine ^loo 
Tabi.e 15: Gold 
ko = 490 X 10-6; ^100 = 351 X 10-^; do = 0.699; ^100 = 0.703; (do dwo) = 0.994 
a - (-0.934 T + 0.001 tT) 
Uq = 1.495 and 5 = 8 and X'o = 15 R, C2 = 0.73 X 10-^, G = -13.7 X 10-^, C-0.0486 
0.04"; 
8% 
0.002 
0.190 
0.259 
3340 -3290 
466 
335 
0.705 
0.672 
1.05 
Table 16: Molybdenum 
ko = 274 X 10-6; ^100 = 191 X 10-6,^o = 0.43(?);i dm = 0.42(?);i (do ^ ^100) = 1.02(?) 
a = (-4.33 T + 0.015 tT) ergs/deg. C. 
If g = 
1.3 and 5 = 10 and X'o 
= 110 i?, C2 = 8.7 X 10- 
^ Ci 
= -51 X 10 
C= 0.0338 
0.0296 
2.8% 
0.009 
0.244 
0.330 
-2850 
-2490 
265 
185 
0 . 439 
0.363 
1.21 
^ See footnote under table 1, cobalt. 
ALLOYS 
Table 17: Constantan 
ko = 20.4 X 10-6; km = 20.4 X 10-6, do = 0.052; dm 
a- = 7.94 T ergs/deg. C. 
0.064; (do dm) = 0.81 
If g = 1.55 and 5 = 5 and X'o = 90 R, Ci = 188 X 10-6 and C = 0.288 
0.3061 
1% 
0.008 
0.126 
0.169 
-12500 
-13300 
14.5 
14.2 
0.054 
0.076 
0.71 
1 Very roughly estimated from the values of 7 given for copper and nickel. 
Table 18: Manganin 
ko = 23.8 X 10-6; ^100 = 23.8 X lO-S; do = 0.051; ^100 = 0.063; (do ^100) = 0.81 
a- = (-0.828 r-0.00672 tT) ergs/deg. C. 
If g = 1.51 and s - 4.5 and X'o = 90 R, C2 = -8.74 X 10-^, Ci = -18.0 X lO"* 
C - 0.27 
0.267 l%i 0.008 0.113 0.152 -10500 -10400 17.4 17.5 0.049 0.060 0.75 
See footnote under table 17. 
