7 6 Mr. Hatchett's Experiments on the various Alloys, 
“ solution of continuity followed ; for the bar, by its own weight, 
“ fell from the supporters on which it was placed, in a rough 
“ dark- coloured mass, having scarcely any appearance of metal, 
“ although it recovered its metallic lustre, and some tenacity, by 
“ being hammered upon a polished anvil. 
ii. 
“ These experiments were repeated, with exactly the same 
“ results ; and seem to prove, beyond a doubt, that gold alloyed 
“ with tin may be repeatedly annealed, after passing the rollers, 
“ without any danger, provided that due attention be paid to 
“ the temperature to which it is exposed. 
“ Hence it may fairly be said, that all which Mr. Tillet has 
“ advanced on the foregoing subject, if closely attended to, will 
“ be found to go in confirmation of what Mr. Alchorne had 
“ previously asserted, relative to the mixture of gold with tin ; 
“ and Mr. Tillet only adduces the additional fact, of a greater 
“ degree of heat destroying the union of the two metals, which, 
“ from a full consideration of their peculiar properties, and dif- 
“ ferent fusibility and specific gravity, might have been inferred 
“ a priori. It is also reasonable to suppose, that whenever a 
“ combination of a more with a less fusible metal takes place, 
“ a temperature insufficient to fuse the whole mass would tend 
“ to separate the one from the other ; and this is the principle 
“ on which the process of eliquation depends. 
“ Mr. Alchorne was induced to make the experiments on 
“ tin and gold, from reading the following passages. e A single 
“ grain of tin will destroy the ductility of a thousand grains of 
“ gold, rendering the most malleable gold incapable of being 
“ extended, and of bearing the hammer at all/ Neumann's 
“ Chemistry, Vol. I. p. 49. 
