0 
I50 PHYSICS: E. H. HALL Proc. N. A. S. 
Third Group: Metals for which Ki>0 and K^X) 
TABLE 12: IRON. 
Ki = 1.78, K2 = 0.0516 
C, or 
C2 = 93 X 10-8 
Ci = 100 X 10-8 
C2 
= 110 X 10-8 
(kf^k), 
at 100° 
Q 
Ci X 10-6 
at 100° 
Q 
Ci X 10-6 
at 100° 
Q 
So 
Ci X 10-6 
at 100° 
0.001 
0 
.015 
66 
.017 
.5 
.010 
70 
.018 
1 
.005 
77 
.020 
0.01 
0 
.019 
44 
.024 
.5 
.012 
57 
.026 
1 
.006 
68 
.028 
0.05 
0 
.031 
—21 
.057 
.5 
.019 
10 
.061 
1 
.009 
43 
.065 
0.10 
0 
.042 
—81 
.101 
.5 
.027 
—43 
.106 
1 
.013 
9 
.112 
0.15 
0 
.052 
—135 
.146 
.5 
.034 
—90 
.151 
1 
.017 
—26 
.158 
0.20 
0 
.060 
—178 
.192 
.5 
.039 
—123 
.198 
1 
.020 
—52 
.205 
0.25 
0 
.068 
—221 
.237 
.5 
.045 
—163 
.244 
1 
.022 
—69 
.254 
TABLE 13: THALLIUN. 
Ki = 0.268, K2 = 0.00336 
C, or 
C2 = 6 X 10-8 
c 
2 = 6.5 X 10-8 
Ci 
= 7.1 X 10-8 
ikf^k), 
at 0° 
Q 
So 
Ci X 10-6 
at 100° 
Q 
So 
CiX 10-6 
(kf^k) 
at 100° 
Q 
So 
Ci X 10-6 
at 100° 
0.001 
0 
.020 
7 
.002 
.5 
.010 
10 
.003 
1 
.006 
10 
.003 
0.01 
0 
.048 
—3 
.011 
.5 
.034 
—1 
.011 
1 
.016 
5 
.011 
0.05 
0 
.130 
—32 
.047 
.5 
.090 
—25 
.048 
1 
.050 
—14 
.049 
0.10 
0 
.186 
—51 
.096 
.5 
.130 
—42 
.096 
1 
.080 
—31 
.098 
0.15 
0 
.227 
—65 
.144 
.5 
.160 
—55 
.145 
1 
.096 
—40 
.147 
0.20 
0 
.262 
—78 
.193 
.5 
.186 
—66 
.194 
1 
.105 
—45 
.196 
0.30 
0 
.324 
—99 
.291 
.5 
.220 
—81 
.293 
,1 
.135 
—62 
.295 
Fourth Group: Metals for which Ki<0 and 7?2>0 
TABLE 14: ALUMINUM. 
Ki = —0.016, K2 = 0.006 
C, or 
C2 = 11 X 10-8 
c 
2 = 12 X 10- 
8 
c 
= 13 X 10-8 
(kf-r-k). 
at 0° 
Q 
So 
CiX 10-6 
at i00° 
So 
Ci X 10-6 
(kf^k) 
at 100° 
Q 
So 
Ci X 10-8 
at 100° 
0.001 
0 
.020 
—1 
.002 
.5 
.012 
—1 
.002 
1 
.006 
—1 
.002 
0.01 
0 
.036 
—11 
.010 
.5 
.022 
—9 
.010 
1 
.012 
—7 
.011 
0.05 
0 
.086 
—41 
.047 
.5 
.058 
—37 
.048 
1 
.032 
—30 
.048 
0.10 
0 
.125 
—64 
.095 
. u 
.088 
—61 
.095 
1 
.047 
—46 
.097 
0.20 
0 
.180 
—97 
.191 
.5 
.126 
—91 
.192 
1 
.068 
—89 
.194 
0.30 
0 
.226 
—125 
.289 
.5 
.155 
—114 
.290 
1 
.088 
—91 
.292 
