Page:Proceedings of the Royal Society of London Vol 60.djvu/37

Rh F ig. 6.

638-6 .638-8 (Ten per cent, zinc.)

Feeling a little diffident about these results, 1 recast the foregoing alloy of 'gold with. 10 per cent, of zinc, into the same mould. The results were as follows :— Fig. 7.

899-e eso-e

This shows that there is still a tendency in this gold alloy with 10 per cent, of zinc to become enriched towards the centre.

This 10 per cent, alloy was then alloyed with a further 5 per cent, of zinc and cast into the same spherical mould. sThe weight of this sphere was 4-021 kilograms. The results were :—