MELTING-POINT OF CHEMICAL ELEMENTS. 



Table 215. 



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

 results obtained by (litTerciit observers. This table gives the extreme values recorded except in a few c.ises wlicrc 

 one observation differed so much (roni 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 



