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Pressure of Blast – Pyrites

Pressure of Blast

See BLAST-PRESSURE.

Prince Rupert's Gold

A kind of pinchbeck; copper 3, zinc 1. See GOLD; TOMBAC.

Prince's-metal

An alloy for cheap jewelry; copper 18, zinc 7. See GOLD; TOMBAC.

Print

A boss or hub on a pattern indicating the place for a core of that shape and dimension. See CORE-PRINT.

Puddling

See MALLEABLE IRON.

Pulverizer

See SAND-PULVERIZER; ROCK-CRUSHER.

Pyrites

A native compound of metal with sulphur. See SULPHUR.