4l6 



Tables 489 (continued) and 490 

 TABLE 489 (continued)-— Conducting Power of Alloys 



Group 3. 



Alloys. 



Weight % 



Volume % 



of first named. 



6X 10 9 



Variation per ioo° C. 



Observed. 



Calculated 



Gold-copper t 

 " t 



Gold-silver t 



« " # 



« t 



" t 



Gold-copper t 



" t 



Platinum-silver t 

 " t 



Palladium-silver t 



Copper-silver t 

 " t 

 " t 

 " t 

 " t 

 " t 



Iron-gold t 

 " " t . 

 " " t . 



Iron-copper t 



Phosphorus-copper t 



Arsenic-copper t 



" t . 

 " t . 



99- 2 3 

 90-55. 



87-95 

 87-95 

 64.80 

 64.80 

 3t-33 

 3!-33 



34-83 

 1.52 



33-33 

 9.81 



5.00 



25.00 



94.40 

 76.74 



42-75 

 7.14 



J-3 1 



13-59 

 9.80 

 4.76 



0.40 



2.50 

 0.95 



5-40 



2.80 



trace 



98.36 

 Si. 66 



79-86 

 79.86 

 52.0S 

 52.08 

 19.86 

 19.86 



19.17 



0.71 



19.65 



5-05 

 2.51 



23.28 



98-35 

 95- ! 7 

 77.64 

 46.67 

 8.25 

 t-53 



27-93 

 21.18 

 10.96 



0.46 



35-42 

 10.16 



1346 

 13.61 

 9.48 

 9.51 

 13.69 

 J3-73 



12.94 



53-°2 



4.22 

 11.38 

 19.96 



5-38 



56-49 

 5J-93 

 44.06 

 47.29 

 50.65 

 50-30 



i-73 

 1.26 

 1.46 



24-5 1 



4.62 

 14.91 



3-97 



8.12 



38.52 



2650 

 749 



1090 

 1 140 



673 

 721 

 885 

 908 



864 

 3320 



330 



774 



1240 



324 



3450 

 3250 

 3030 

 2870 



2750 

 4120 



349° 



2970 

 487 



'550 



476 

 1320 



5i6 



736 



2640 



4650 

 81 



793 

 1160 

 246 

 495 

 53i 

 641 



570 

 7300 



208 

 656 

 1 150 



154 



7990 

 6940 

 6070 

 5280 

 4360 

 8740 



7010 



1220 



■03 



2090 



M5 

 1640 



989 



446 



4S30 



21.87 

 7.41 



10.09 

 10.21 

 6.49 

 6.71 

 8.23 

 8.44 



8.07 

 25.90 



3.10 



7.08 



11.29 



3-40 



26.50 



25-57 

 24.29 



22.75 

 23-17 

 26.51 



27.92 



17-55 

 3-84 



13-44 



23.22 



7-53 



9-65 

 9-59 

 6.58 

 6.42 

 8.6? 



8.18 

 25.86 



3.21 



7-25 

 11.88 



4.21 



27.30 

 25.41 

 21.92 

 24.00 



2 5-57 

 29.77 



14.70 

 11.20 

 13.40 



14.03 



Annealed. 



t Hard-drawn. 



TABLE 490. — Allowable Carrying Capacity of Rubber-covered Copper Wires 



(For inside wiring — Nat. Board Fire Underwriters' Rules.) 



Smithsonian Tables. 



