On the Liquation of certain Alloys of Gold. 

 FIG. 6. 



638-8 



(Ten per cent, zinc.) 



Feeling a little diffident about these results, 1 recast the foregoing 

 alloy of gold with 10 per cent, of zinc, into the same mould. 

 The results were as follows : 



FIG. 7. 



(Ten per cent, zinc.) 



This shows that there is stiii a tendency in this gold alloy with 

 10 per cent, of zinc to become enriched towards the centre. 



This 10 per cent, alloy was then alloyed with a further 5 per cent, 

 of zinc and cast into the same spherical mould. The weight of this 

 sphere was 4'021 kilograms. The results were : 



