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Perhaps the most satisfactory bronze metal is the alloy used in France for more than a century. It contains 91.60 per cent of copper, 5.33 per cent of zinc, 1.70 per cent of tin, and 1.37 per cent of lead. Somewhat more zinc is taken for articles to be gilded.
Bismuth Bronze.
Gun Bronze.—See Phosphor Bronze under this title.
Japanese Bronzes.
I.—Copper, 81.62 per cent; tin, 4.61 per cent; lead, 10.21 per cent.
II.—Copper, 76.60 per cent; tin, 4.38 per cent; lead, 11.88 per cent; zinc, 6.53 per cent.
III.—Copper, 88.55 per cent; tin, 2.42 per cent; lead, 4.72 per cent; zinc, 3.20 per cent.
Sometimes a little antimony is added just before casting, and such a composition would be represented more nearly by this formula:
IV.—Copper, 68.25 per cent; tin, 5.47 per cent; zinc, 8.88 per cent; lead, 17.06 per cent; antimony, 0.34 per cent.