317 
Ul. | Alloys. 
§ 12. Gold-Silver. On account of the usually great influence of 
admixture upon the Harr effect and upon the magnetic change of 
resistance it was thought desirable to investigate various kinds of 
alloys. We are already in a position to communicate details of the 
behaviour of one solid solution, viz. an alloy formed by fusing 2°/, 
by volume of silver with gold. The exact analysis we shall publish 
later. d was here 0,073 mm. 
TABLE “XII. 
Harr-effect for a gold alloy 
_T= 290° | T = 20°.3 T = 149.5 
RH cesar At es Pe Re R 
8250 || 570 | 691104 || 5.60 | 6.79<10—4 || 5.44 | 6.60><10—4 
9065 | 6.31 | 6.96 — = oe = 
9360 || — = | 646 | 6.90 2s = 
9760 || 6.75 | 6.91 re = 6.44 | 6.60 
10270 | 7.08 | 6.90 | 7.01 | 6.83 6.80 | 6.62 
| 
I ! 
w = 3.81X<10—! 0 | w = 1.083X10-4 2) w = 1.080X10-4 0, 
4 = 106 [© — 0.298 EN | 
Wy Wy Wo 
| 
Here we have 
rar 
fa) 25.0085 
RT =290 
Pr 
B 0 
Rr=290 
The observations show that down to hydrogen temperatures and 
in that region itself the Han. coefficient decreases slightly ; both 
changes however are so small that they do not exceed the limits of 
the probable error. 
