of Alloys of Bismuth and Tin. DD 
bismuth, and has found for his specimen the value 
13°2 x 10-6 *, whilst Wills, who employed fields ranging from 
1620 to 10450 lines per sq. em., found that k& remained 
constant throughout this range, his mean value being 
12°5x10-°+. Hence we see that the results given in this 
paper agree very well with those of previous observers. 
Alloy No. 1.—Containing 1°23 per cent. tin. 
Radius of rod =*2493 cms. 
C. Be ae Pal kX 10°. 
1-7 amps.| 222 TO "052 116 
2-4 314 74 =| 104 1k5 
32 418 53°8 "186 iar: 
4 523 83 "288 ELS 
4°8 627 119 "412 Hd ea 
6 784 85 "644 115 
7 915 sare "812 11:6 
8 1046 152 Potts 11:5 
9 1176 192°3 | 1-45 11-5 
9°8 1281 228 1-72 11-5 
, 
It will be observed that for this alloy the value of & is 
constant throughout the range of field strengths, H, employed. 
The mean value thus obtained is £=11°54 x 10-°, which is 
about 17 per cent. less than that obtained for pure bismuth. 
Alloy No. 2.—Containing 3°01 per cent. tin. 
Radius of rod =*2446 ems. 
} 
CA lead: Ot 8 P. | &x10° 
| 18amps: 235 225 | 043 | 8-90 
2-5 
25 Pao | 49-7 |° -083 -| 8-86 
3-2 418 694 ‘136 | 886 
4 593 | 1038 | -211 | 8:77 
48 627 | 1026 | 302 | 871 
6 784. 2030 | 475 | 8-77 
7 915 | 873 ‘652 | 888 
8 1046 «1095 -«| 851) 884 
9 1176 | 1624 | 109 | 892 
— 
= 
1307 170-4 L32ie hh SS 
lee as es we 
In the ease of this alloy, too, it appears that the magnetic 
susceptibility is independent of the magnetizing force. 
* Curie, Comptes rendus, cxvi. p. 137 (1898). 
+ Wills, Phil. ) ag. xlv. p. 446 (1898). 
