430 



C. Barus — Certain generic Electrical 



Table I. — Showing Matthiessen and Vogtfs results for the electrics of gold, silver, and 



copper alloys. 







Composi- 





Observed 



A xl0 3 



Calculated 



SaxlO 5 . 





Alloy. 



tion. 



"k . 



axlO 3 . 



microhms. 



(kxlO 3 . 



Gold 



Au 





79 



3-67 



506 



369 



- 2 



alloys. 



AuCu 



1-6 % Cu 



56-1 



2-65 



359 



2-63 



+ 2 





AuCu 



18-3 % Cu 



16-1 



0-75 



103 



0-79 



- 4 





AuAg 



20-1 % Ag 



21-5 



111 



137 



1-03 



+ 8 





AuAg 



47*9 % Ag 



152 



0-70 



96 



0-74 



- 4 



Silver 



Ag 





109 



3-82 



691 



3-83 



± o 



alloys. 



*AgCu 



1-5 fcCu 



79-7 



4-12 (?) 



510 













AgCu 



8-2 % Cu 



80-3 



2-75 



514 



2-88 



— 13 





AgCu 



46-7 % Cu 



74-9 



2-80 



480 



2-69 



+ 11 





AgPt 



2-5 % Pt 



31-6 



1-24 



202 



1-20 



+ 4 





AgPl 



5-0 % Pt 



18-0 



0-77 



115 



0-73 



+ 4 





AgPt 



197 % Pt 



6-7 



0-33 



43 



034 



— 1 





AgPd 



23-3 % Pd 



8-5 



0-32 



55 



0-41 



- 9 





AgAu 



19-9 % Au 



21-7 



0-90 



139 



0-86 



+ 4 



Copper 



Cu 





102 



3-87 



653 



398 



-11 



alloys. 



CuAg 



1-6 % Ag 



89-5 



3-45 



573 



3 54 



- 9 





CuAg 



4-8 % Ag 



823 



3'25 



527 



3-29 



- 4 





CuAg 



22-4 % Ag 



69-8 



3-03 



447 



2-85 



+ 18 





CuAu 



0-7 % Au 



84-0 



3-32 



538 



335 



— 3 





CuAu 



19-2 % Au 



20-5 



0-86 



131 



1-11 



-25 





CuFe 



0-5 % Fa 



38-9 



1-55 



249 



1-76 



-21 





CuZn 



5-0 % Fe 



60-4 



2-47 



387 



2-52 



- 5 





CuZn 



10-9 % Zn 



46-9 



2-05 



300 



2-04 



+ 1 





CuZn 



23-6 % Zn 



21-3 



1-88 



136 



1-14 



+ 74 





CuZn 



29-4 % Zn 



21-7 



1-27 



139 



115 



+ 12 





CuZn 



42-1 % Zn 



21-8 



1-37 



140 



1-16 



+ 21 





CuSn 



1-4 % Sn 



625 



2-68 



400 



2-59 



+ 9 





CuSn 



6'0 % Sn 



19-7 



1-00 



126 



1-08 



- 8 





CuSn 



11-6 % Sn 



12-1 



0-69 



77 



0-81 



-12 





CuSn 



12 3 #Sn 



10-2 



0-67 



65 



0'74 



- 7 





CuSn 



14-9 % Sn 



8-8 



055 



56 



069 



-14 





CuP 



1-0 %¥ 



23-6 



1-32 



151 



1-22 



+ 10 





CuP 



2-5 f F 



7-3 



04.8 



47 



0-64 



-16 





CuAs 



trace 



61*1 



264 



391 



2-54 



+ 10 





CuAs 



2-8 % As 



12-9 



0-74 



82 



0-84 



-10 





CuAs 



5-4 i As 



63 



0-52 



40 



0-61 



- 9 



* Rejected. 

 (a + m=n\ Q ) 



Gold alloys ra= — 0-000045±0-000030 

 w= +0*00721 ±0*00010 



Silver alloys m= -0-0001 12^0-000031 

 n = 0-00538 ±0-00085 



Copper alloys m= -0-000386^0-000040 

 n = 0-000551±0-00012 



concides with the initial carves throughout an enormous ex- 

 tent of their course. Matthiessen* who expressed a similar 



* Matthiessen and Vogt 

 p. 19, 1864. 



Phil. Mag. (IV), xxvii, p. 467, 1863 ; Pogg. Ann., cxxii, 



