991 
TABLE XX. 
HALL effect for (Au—Ag) 
| T=200°K, | T=90°K. T=20.°3K. || T= 14.°5K. 
H |= pee | IL Ô 
| | RH RX RH —RX104| RH |—R>X104| RH |— RX 104 
| | 
9220 || 7.10 7.70 A Bake 6.41 6.95 || 6.38 6.92 
= a = | = — ||6.59] 6.94 
9760 || 7.56| 71.75 || 7.22) 7.41 || 6.82] 6.99 || 6.73) 6.90 
W200) W951 1.745 | 7.71 | 7.51. | 7.49 | 6:04, 17.09 | 6.90 
w =25.2X10-5.0) w = 12.1X10-5Q w =8.1X 10-59 w = 8.7 10-50 
LS |e 
\ 
Sa. 04 || @ — 0.525 == 6.96 Ee 
| Wo || Wo Wo Wo 
Ul i 
In Table XXI are collected my results for alloys of gold and silver. 
In it are given results for the Haru coefficient 7, and its temperature 
os Rr RK 
coefficient — —, for the Lrpvuc constant Dz==—, and for the tempe- 
‘ aw) 
290 
rature coefficient of the resistance without a magnetic field. All are 
expressed in c.g.s. units. 
Fig. 1 is a diagram of the electrical conductivity (o) at 7'— 290° K. 
and at 7'—=90°K. as a function of the atomic percentage of Ag. 
The unit in which the conductivity is expressed is the reciprocal 
of the resistance in obms of a 1 em. edged eube. The conductivity 
was calculated from the analyses. (See a previous paper ')). 
At lower temperatures the characteristic curves become steeper. 
This is strongly marked at hydrogen temperatures as is shown by: 
the measurements of KAMERLINGH Onnes and Cray *) on a goid-silver 
alloy containing about 0.4°/, Ag, and by Cray’s*) measurements 
on Au-Ag alloys with various compositions. The latter measurements 
have been confirmed by mine, and have been further extended to 
embrace cases of average and of small content of Aw. For these 
cases, somewhat similar results were obtained as with small content 
of Ag: the addition of a small quantity of gold to pure silver 
causes such an enormous decrease in the conductivity that, for 
1) Benet Beckman. Upsala Univ. Arsskrift 1911. 
2) H. KAMERLINGH ONNES and J. Cray, Comm, n’. 99. 1907, 
8) J. Guay. Comm. n°. 107d, 1908. 
