( 212 ) 



accurate agreement including — 252", but a large deviation at — 259°, 

 These are given in table II under the heading W — Rati- 



Lastly we have obtained a preliminary solution B which fairly 

 represents all temperatures including — 252° and — 259° and from 

 which the deviations are given in table II under IF — Rb , and a 

 solution of the form C which agrees only to — 252° and to which 

 W — Re relates. 



The constants of the formulae under consideration are : 



TABLE II. 

 COMPARISON BETWEEN THE PLATINUM RESISTANCE 

 THERMOMETER AND THE HYDROGEN THERMOMETER. 



