266 Table 273. 



CONDUCTIVITY OF THREE-METAL AND MISCELLANEOUS ALLOYS. 



Conductivity !n mhos or 



ohms per cm. cube 



=Ci=C^{i-at+bfi). 



Metals and alloys. 



Gold-copper-silver 



« it <( 



Nickel-copper-zinc 



Brass .... 

 " hard drawn 

 " annealed . 



German silver 



Aluminum bronze . . . 

 Phosphor bronze . . . 

 Silicium bronze . . . . 

 Manganese-copper . . . 

 Nickel-manganese-copper 



Nickelin 



Patent nickel 



Rheotan 



C opper-manganese-iron 



Manganin . 

 Constantan 



Composition by weight. 



58.3 Au -f 26.5 Cu + 1 5.2 Ag 

 66.5 Au -j- 15.4 Cu -f 18.1 Ag 

 7.4 Au 4- 78.3 Cu + 14,3 Ag 



I 12.84 Ni + 30.59 Cu + ) 

 \ 6.57 Zn by volume . . . ) 



Various 



70.2 Cu-f 29.8 Zn .... 



Various 



! 60.16 Cu + 25.37 Zn + 

 1 4.03 Ni + .30 Fe with trace \ 

 of cobalt and manganese . 



30 Mn + 70 Cu 



3 Ni + 24 Mn -f- 73 Cu . . 



^i8.46Ni + 61.63 Cu-f 

 ? 19.67 Zn -\- 0.24 Fe -)- 

 ( 0.19 Co + 0.18 Mn . . . 

 ( 25.1 Ni-f- 74.41 Cu + 

 l 0.42 Fe -f 0.23 Zn + 

 (0.13 Mn -j- trace of cobalt 



( 53.28 Cu -f 25.31 Ni -f- 



] 16.89 Zn -1-4.46 Fe4- 



( 0.37 Mn 



91 Cu -1- 7.1 Mn -}- i.9Fe . 



70.6 Cu -|- 23.2 Mn -|- 6.2 Fe 



69.7 Cu -}- 29.9 Ni -\- 0.3 Fe 



84CU-I- i2Mn-}-4Ni. . 

 60 Cu -f- 40 Ni 



7.58 

 6.83 

 28.06 



4.92 



1.90 



4-98 



1.30 

 2.60 



2-3 



2.04 



aXioS 



574 



529 

 1830 



444 



410 



120 

 22 

 120 



0-42 

 18 



6Xio» 



924 



93 



7280 



51 



300-600 



1 Matthiessen. 



2 Various. 



8 W. Siemens. 



* Feussner and Lindeck. 



5 Van der Ven. 



6 Blood. 



^ Feussner. 



'' Jaeger-Diesselhorst. 



Smithsonian Tables. 



