640 
MR. EDWARD MATTHEY ON THE LIQUATION 
Alloy I. Platinum 
Palladium 
Parts in 1000 :— 
850 parts. 
150 
Outside. 
Intermediate. 
Centre. 
Platinum. 
Palladium. 
Platinum. 
Palladium. 
Platinum. 
Palladium. 
854 
146 
848 
150 
842 
150 
849 
150 
854 
147 
847 
150 
850 
146 
847 
149 
852 
148 
Average . S49'8 
148-6 
850-6 
147-6 
Maximum difference between centre and mean of outside:—Platinum, 7'8 per thousand ; Palladium, 
P4 per thousand. 
y. 
The foregoing results distinctly prove that there is still a slight concentration of 
palladium at the centre. 
II and I. 
As the results of the two foregoing alloys were non-malleable, the first being 
decidedly brittle, I proceeded to investigate this point further by intimately mixing 
pure sponge platinum and pure sponge palladium in the same proportions as in these 
two alloys, subjecting the mixed sponge metals to hydraulic pressure in a steel mould, 
heating them and forging the alloys so heated, in the same manner as with ingot 
platinum made from sponge platinum. In both cases these alloys, which had been 
prepared by welding and not fusion, were perfectly tough and malleable, proving 
that the high temperature necessary for melting these alloys enables them to pass into 
a crystalline state. 
I then melted these two malleable alloys, II and I, by means of the oxyliydrogen 
