The Probert Encyclopaedia of Science & Technology

FUSIBLE

Fusible is a term meaning something which can be melted. Fusible metal is an alloy, usually of lead, tin, and bismuth, compounded in such definite proportions as to melt at a given low temperature. In steam-engines, a plug of fusible metal was placed in the skin of the boiler, so as to melt and allow the steam to escape when a dangerous heat is reached - thereby forming a safety fuse.
Research Fusible