The oxide is fusible only in the oxy-hydrogen flame.
These alloys are harder, more fusible and more sonorous than pure gold.
Though fusible at a very low temperature, and very soft, it has great power of resisting decay from damp or exposure.
Broadly the malleable and ductile metals and alloys show a fibrous character when ruptured, the fusible ones a crystalline fracture.
Newton's fusible metal (named after Sir Isaac Newton) contains 50 parts of bismuth, 31.25 of lead and 18.75 of tin; that of Jean Darcet (1725-1801), 50 parts of bismuth with 25 each of lead and tin; and that of Valentin Rose the elder, so of bismuth with 28 1 of lead and 24 I of tin.