630 
MR. EDWARD MATTHEY ON THE LIQUATION 
A. 
In order to prove incontestably this liquation of platinum to the centre of the 
mass, I again melted together ninety parts of fine gold with ten parts of pure 
platinum. 
This alloy was melted in a plumbago crucible in the intense heat of an oil furnace, 
and when melted several times and stirred, was cast into a spherical mould of cast- 
iron. The weight of the sphere was about 5 kilogs. This, cut into two hemispheres, 
showed the results given in Diagram B. 
B. Gold. . 
Platinum 
900 parts. 
100 
Parts of gold in 1000 :— 
Outside. 
Intermediate. 
Centre. 
904-6 
893-6 
874 
905 
893-6 
903 
897 
904 
905- 3 
906- 3 
903 
906 
Average . 904'6 
900-6 
Maximum difference m the gold between centre and mean of outside, 30 6 per thousand. 
