TABLE 266. 



ALLOYS AT LOW TEMPERATURES. 



by Cailletet and Bouty at very low temperatures. The results show that the coefficient of change with temperature 

 the alloys. The resistance of carbon was found by Dewar and Fleming to increase continuously to the lowest 



nients or Miiller, Benoit, and others. Probably the simplest rule is that suggested by Clausius, and shown by these 

 temperature. This gives the actual change of resistance per degree, a constant ; and hence the percentage of change 

 approximately hold for alloys, some of which have a negative temperature coefficient at temperatures not far from 



* This is a in the equation R =. R (i -I- a/), as calculated from the equation a=: 



200 An 



SMITHSONIAN TABLES. 



257 



