Keys to the Past

Glossary

Pigs

Blocks of cast metal, such as cast iron made at a blast furnace or foundry. They are so-named because the shape of the moulds arranged around a central channel look like piglets suckling or feeding from a trough in plan view. The casting floor where the moulds were was sloped down from the furnace so as to allow the molten metals to flow easily and evenly.

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