Resistance of Metals and Alloys. 299 



Table III. 



Volume- Specific Resistances (p ) in C.G.S. units of Alloys 



at 0° C, and Temperature-Coefficients (a) at 15° C. 





Po- 



«15- 





31582 



30896 



21142 



6280 



67148 



29452 



29982 



41731 



46678 



2064 



4641 



2904 



8847 



14912 



3887 



•000243 



•000822 



•00143 



•00124 



•00127 



•00201 



•000273 



•00031 



•0000 



•00285 



•00238 



•00381 



•000897 



•000645 



•00290 





Platinum-Rhodium 



Gold-Silver 





Nickel- Steel 





Platinoid 

















Table IV. 



Volume- Specific "Resistances in C.G-.S. Units of Pure Metals 

 at 0° C.j and Mean Temperature-Coefficients between 0° and 

 100° C. The metals in all cases soft and annealed. 



Metal. 



Po. 



a 0-100. 



Platinum 



C.G S. units. 

 10917 



2197 

 10219 



1468 



1561 



2665 



9065 

 12323 

 13048 



4355 



5751 

 10023 

 20380 

 17633 



•003669 



•00377 



•00354 



•00400 



•00J28 



■00435 



•00625 



•00622 



•00440 



•00381 



•00406 



•00419 



•00411 



•00398 



Gold 



Palladium 



Silver .' 



Copper 



Aluminium 



Iron 



Nickel 



Tin 



Magnesium 



Zinc 



Cadmium 



Lead 



Thallium 





In conclusion we desire to express our indebtedness to 

 Messrs. J. and D f Morris for the valuable assistance they 

 have given us in the conduct of this research, and in the 

 reduction and graphic description of the numerous observa- 

 tions. We hope, in a future communication, to be able to 

 state the results of similar observations at still lower tempe- 

 ratures. 



X2 



