MAGNETIZATION AND MAGNETOSTRICTION. 13 



the application of breaking stress is maximum ; it is for about the same 

 percentage that the irreversible metal can be made reversible, while 

 the temperature of transformation by cooling becomes very low ; and 

 for the same percentage, the rate of decrease of the thermal coefficient 

 of expansion due to the addition of nickel is the greatest. 



These coincidences do not appear to be merely accidental and 

 further researches as to electric and thermal conductivities will probably 

 reveal similar singularities in the same region. A really satisfactory 

 theory of the constitution of the alloy must explain, not only the 

 metallurgical aspect of the metal, but also its various physical 

 characteristics, and unite them in a common bond. For this purpose, 

 different investigations by chano-ino- the conditions under which the 

 metal is tested, will give valuable clues to the exposition of a theory 



