On the Liquation of certain Alloys of Gold. 27 



There is evidence of re- arrangement by liquation in this case 

 which sends gold to the centre, but the result is complicated, as 

 gravity appears also to send gold to the lower portion of the spherical 

 mass. 



The foregoing mixture (No. 2) of 



Gold 75 parts. 



Lead 15 



Zinc 10 



was now further alloyed by the addition of 5 per cent, of pure copper 

 and cast into a sphere which was very hard and brittle, and weighed 

 about 2 kilograms. 



The following are the results at the points shown : 



FIQ. 3. 



Here again, gravity appears to send gold to the lower portion of the 

 sphere. 



The question arises, does the silver play any part in the distribu- 

 tion of the baser metals, lead and zinc ? 



I therefore melted sphere No. 3 with 10 per cent, of silver, so that 

 there were present : 



Gold 63-4 (by difference) 



Silver 7'8 



Copper 5'1 



Zinc 8'8 



Lead 14-5 



Iron 0'4 



100-0 



and cast into an open mould, and subsequently into the spherical 

 mould. The following were the results obtained of fine gold at the 

 points indicated : 



