MELTING-POINT OF CHEMICAL ELEMENTS. 



TABLE 215. 



The melting-points of the chemical elements are in many cases somewhat uncertain, owing to the very different 

 results obtained by different observers. This table gives the extreme values recorded except in a few cases where 

 one observation differed so mucji from all others as to make its accuracy extremely improbable. The column 

 headed " Mean " gives a probable average value. 



BOILING-POINT OF CHEMICAL ELEMENTS. 



TABLE 216. 



The column headed " Range " gives the extremes of the records found. Where the results are from one observer 

 the authority is quoted with date of publication. 



SMITHSONIAN TABLES. 



207 



