1889.] 



On certain Ternary Alloys. 



4(53 



These figures are the results of the analysis of the ingots obtained by 

 melting the various mixtures in a crucible, well stirring together for 

 some minutes, pouring into the red-hot bowl of a plugged clay 

 tobacco-pipe, and keeping molten for some hours whilst at rest, and 

 finally quickly cooling by removing the source of heat (a bunsen 

 burner). The differences between the compositions of the top and 

 bottom portions of the ingots are obviously no greater than what may 

 be reasonably ascribed to surface oxidation and volatilisation, and 

 possible slight variation introduced through partial separation into 

 differently fusible alloys during solidification. 



On the other hand, the following figures were obtained with three 

 other mixtures, in which the tin constituted respectively about 9, 20, 

 and 27 per cent, of the whole, whilst the zinc and lead were in the 

 ratios 2 to 1, 1 to 1, and 1 to 2 in the three cases respectively : 



