TABLE 386.— RESISTIVITY OF METALS AND SOME ALLOYS 385 



(continued) 



Substance Remarks 



Iron pure, soft 



Lead 



Lithium solid 



electrolytic 

 cold pressed 



Magnesium 



liquid 



free from Zn 



pure 



Manganese .... 



Manganin 84 Cu, 12 Mn, 4 Ni 



Mercury 



solid 



liquid 



Molybdenum very pure 



Monel metal 

 Nichrome . . . 

 Nickel 



very pure 

 pure 



Osmium . 

 Palladium 



Platinum 



very pure 



Tempera- 

 ture 

 °C 



+ 98.5 

 196.1 



400 







100 



20 



-183 



- 78 







+ 90.4 



196.1 



318 



—187 







99.3 

 230 

 20 

 -183 



- 78 





 + 98.5 

 400 



20 



20 

 -183.5 

 -102.9 



- 50.3 



- 39.2 



- 36.1 







50 



100 



200. 



350 







20 

 20 

 20 

 20 

 -182.5 



- 78.2 





 94.9 



20 



20 



-183 



- 78 





 98.5 

 

 -203.1 



- 97.5 





 100 

 400 



Microhm- 

 cm 



17.8 



21.5 



43.3 



10.0 



14.41 



22 



6.02 

 14.1 

 19.8 

 28 

 36.9 

 94 



1.34 



8.55 

 12.7 

 45.2 



4.6 



1.00 



2.97 



4.35 



5.99 

 11.9 



5.0± 

 44 



95.783 

 6.97 



15.04 



21.3 



25.5 



80.6 



94.07 



98.50 



103.25 



114.27 



135.5 



5.14 



42 

 100 

 7.8 

 7.236 

 1.44 

 4.31 

 6.93 



11.1 



9.5 

 11 



2.78 



7.17 



10.21 



13.79 



9.83 



2.44 



6.87 



10.96 



14.85 



26 



Temperature coefficient 



, * , 



t s a a 



500 +.0147 

 1000 +.0050 



20 

 18 



20 

 



25 

 100 

 500 

 600 



12 



25 

 100 

 250 

 475 

 500 



20 

 



R, = R B (1 + 

 .00089r + 

 .000001 / 2 ) 



25 

 100 

 1000 

 20 

 20 

 20 





 25 



100 



500 



1000 



20 

 



20 

 



+ .0039 

 + .0043 



+ .004 



+.0038 



+.0050 



+.0045 



+.0036 



+ .0100 



+.000006 

 .000000 

 —.000042 

 —.000052 

 —.000000 

 -.00011 

 +.00089 

 +.00088 



+.0033 

 + .0034 

 +.0048 

 +.0020 

 + .0004 

 +.006 



+.0062 

 +.0043 

 +.0043 

 + .0030 

 +.0037 



+.0033 

 +.0035 



+.003 

 +.0037 



(continued) 



SMITHSONIAN PHYSICAL TABLES 



