Subject matter wherein the special container or enclosure structure includes: (1) a vessel or melting pot of some very refractory substance, such as clay, graphite, porcelain, or a relatively infusible metal, used for melting solid substances which require a high degree of heat or (2) an enclosed structure comprised of a very highly refractory substance whereby a very high degree of heat may be transferred to a solid material contained therein.
(a relatively infusible metal; used; for melting solid substances) (a solid material; contained therein; ) (solid substances; require; a high degree of heat or (2) an enclosed structure) Context(solid substances require,List([226, 256))):(a very high degree of heat; may be transferred; to a solid material)
solid substances require,List([226, 256))
a relatively infusible metal a solid material solid substances a very high degree of heat
used contained therein require may be transferred
for melting solid substances
a high degree of heat or (2) an enclosed structure
to a solid material