abstracts: physics 



285 



in general practice, a typical thermo-element curve has been tabulated 

 in small 10° intervals thruout its entire length from melting ice to 

 melting platinum, together with a diagram showing the character and 

 magnitude of the variation from this curve which may be expected to 

 appear in other thermo-elements of the same nominal composition (90 

 parts platinum, 10 parts rhodium) . With a new platin rhodium thermo- 

 element of undoubted homogeneity, but unknown constants, it is quite 

 practicable with this table to prepare a curve of its electromotive force 

 for any temperature with sufficient accuracy for most purposes (say 5° 

 at low temperatures and =*= 10° above 1200°) from a single determination 

 in melting copper. 



List of Standard Melting Points 



