Dr. Pearson’s Observations 
416 
fore they were melted, but it was not so close grained as any 
of the ancient metals after fusion ; and it differed from all of 
them in being of a lightish brown colour. 
The solution in nitric acid differed only from the former in 
affording a greater proportion of white deposit, namely, thir- 
teen grains and a half per cent. 
Experiment 5. 900 grains of copper were melted with 100 
grains of tin : which allay of nine parts of copper with one of 
tin differed very little from the former. 
By means of nitric acid this allay gave seventeen grains per 
cent, of oxide of tin. 
Experiment 6 . 100 grains of tin were melted with 800 
grains of copper. This allay of eight parts of copper with one 
of tin was also scarcely distinguishable from the two former 
allays, in colour, strength, appearance of fracture, texture, and 
polish. 
With nitric acid this allay afforded eighteen grains and a 
half per cent, of oxide of tin. 
Experiment 7. 100 grains of tin were melted with 700 
grains of copper. This allay of seven parts of copper with 
one part of tin was evidently different from any of the former 
allays ; being harder, more brittle, paler coloured, the fracture 
showing a much finer grain, and of a grey or somewhat slate- 
colour. The grain, therefore, of this allay resembles in co- 
lour that of the celt, No. 3, the lituus, the spear-head, and the 
scabbard. It was especially like the lituus and the celt, No. 3, 
in the rather bright and silvery appearance of the fracture, in- 
stead of the dull slate colour of the spear-head and sauce-pan. 
On tr'al with the hammer, and the drill, it resembled exactly the 
lituus in brittleness and hardness. It was a little harder and 
