On the Liquation of certain Alloys of Gold. 



25 



Gold 27-914 kilograms. 



Silver 3-568 



which proved that the actual gold standard of the ingot was 703'9. 



The base metal in two similar ingots was found by analysis to be 



composed as follows : 



(492 ) (494.) 



Silver 8'9 8'0 



Lead 9'0 77 



Zinc 4-8 8-5 



Copper 5-2 3'2 



Iron 0-4 V6 



Nickel 0-8 1-8 



Gold (by difference).. 7O9 69'2 



100-0 100-0 



from which it would appear that the presence of one or both of the 

 metals zinc and lead bears in some degree upon these variations 

 in quality it being well known that gold will alloy, and be constant 

 in quality, with either silver or copper or with both in almost any 

 proportions. 



Advancing progressively, I now cite an instance of irregular dis- 

 tribution in a much baser alloy of gold. 



An ingot of base gold alloy (P. 13) weighing 9'570 kilograms. 



Determinations from the top of this ingot gave results 

 Point a 



Gold. 

 265-0 

 378-4 

 383-0 



Silver. 



213 



From the bottom, point 6 

 527-2 



560-0 66 



545-5 



From a " dip " taken from the fused alloy - 



561-0 



618-5 75 



683-0 

 differences which are too significant to need comment. 



