646 
MR. EDWARD MATT HEY ON THE LIQUATION 
L 
The above are the proportions of gold found at the different points of the hemi¬ 
sphere. 
It will be evident that the cooling of the alloy has been attended with much 
re-arrangement, but it is difficult to say that there has been true liquation or 
concentration of any given constituent of the alloy, as the mass seems to be a congeries 
of complex alloys of aluminium and gold. 
The beautiful rose-purple alloy of aluminium and gold, prepared in accor¬ 
dance with Professor Roberts-Austen’s instructions in 'Nature/ June 21, 1891— 
viz., 786 parts of pure gold and 214 parts of aluminium—were melted together, 
thoroughly mixed, and cast into a 3-inch sphere. 
This alloy, which I call M, is extremely brittle, but the beauty of its magnificent 
fracture was most striking; and the purple-pink appearances in the fractured spheres 
K and L are evidently reproductions of this alloy in some other proportions. 
Evidences of this colouring have been alluded to as showing in the alloys K and L. 
Trials made from various parts of the sphere, when broken up, showed proportions 
of gold as under. 
Alloy M. Gold. 786 parts. 
Aluminium. 214 ,, 
Parts in 1000 of gold :— 
Outside. 
Centre. 
7831 
783-2 
781-5 
781-5 
784-3 
782-9 
Average . . 782"6 
Maximum difference in the gold between centre and mean of outside, '6 per thousand. 
