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Jacket-core
The core which forms the space betwixt inner and outer shells of a jacketed casting, as a jacketed cylinder, etc. Sometimes these shells…
Japanese Bronze-work
The art of working in bronze is a very old one in Japan. The whole process of casting is done by the artist himself, who forms his moulds…
Jasper
Like carnelian, agate, and chalcedony, this mineral is chiefly composed of silex, but it always contains more iron, and hence, instead of…
Jobbing-moulder
A moulder whose superior attainments enable him to mould more than one class of castings. Such qualifications are acquired only by…
Jobbing-pipe
A technical term for all pipes that are irregular in form, including elbows, turns, branch, and numerous others, which must of necessity be…
Joint
A common name for the point of separation in moulds. When two halves of a core are placed together the joining surfaces form the joint; so…