1887.] On the Heating Effects of Electric Currents. 291 



Aluminium. 



Diameter 

 in 

 inches. 



Actual 

 fusing 

 current in 

 amperes. 



Fusing 

 current 

 calculated. 

 arf 3 ' 2 . 



Constant 

 "a." 



"004 



3 • 322 



2 Oil 



13130 



0-0G7 



5 253 



4 654 



8970 



010 



10-20 



7-948 



10200 



012 



10-51 



10-45 



7996 



0-014 



16-19 



13 17 



9757 3 



0-018 



21 -01 



19-20 



8700 



0-020 



23-48 



22/48 



8302 



0-026 



28-93 



33-33 



6900 



0-030 



37-08 



4130 



7133 



033 



38 -93 



47-65 



6493 



0-036 



43-80 



54-30 



6413 



0-040 



52-53 



63-57 



6568 







Mean — 



7948 -4 



Platinum. 



Diameter 

 in 

 inches. 



Actual 

 fusing 

 current in 

 amperes. 



Fusing 

 current 

 calculated. 

 ad™. 



Constant 

 " a." 



0-004 



1-723 





6826-5 



0-005 



2-192 



1*859 



6200 



0-007 



3 211 



3-080 



5482 -7 



010 



5 285 



5-258 



5285 



0-012 



6-734 



6-910 



5122-8 



0-014 



8-104 



8-710 



4884 



-018 



11 -28 



12 700 



4671 



0-020 



13-78 



14-872 



4872 



0-027 



22-55 



23 330 



5082 -8 



0-030 



28-12 



27 '320 



5411-8 



-033 



32 75 



31520 



5463 -2 



037 



37-08 



37 -420 



5209-9 



0-040 



43-26 



42-063 



5407 -4 







Mean = 



5258 



