OPEN a.
, used in manufacturing steel. -- Open-hearth process (Steel Manuf.), a process by which melted cast iron is converted into steel by the addition of wrought iron, or iron ore and manganese, and by exposure to heat in an open-hearth furnace; -- also called the Siemens-Martin process, from the inventors. -- Open-hearth…
PATTERN n.
A full-sized model around which a mold of sand is made, to receive the melted metal. It is usually made of wood and in several parts, so as to be removed from the mold without injuring it. Pattern box, chain, or cylinder (Figure Weaving), devices, in a loom, for presenting several shuttles to the picker in the proper s…
PEMMICAN n.
Meat, without the fat, cut in thin slices, dried in the sun, pounded, then mixed with melted fat and sometimes dried fruit, and compressed into cakes or in bags. It contains much nutriment in small compass, and is of great use in long voyages of exploration.
PIG n.
oöl.) See under Masked. -- Pig bed (Founding), the bed of sand in which the iron from a smelting furnace is cast into pigs. -- Pig iron, cast iron in pigs, or oblong blocks or bars, as it comes from the smelting furnace. See Pig, 4. -- Pig yoke (Naut.), a nickname for a quadrant or sextant. -- A pig in a poke (that…