Cornish Mine Terms
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Term Definition Examples
Parcel  A pile of ore ready for sale.
Pitwork  The pumps and other related equipment of the engine shaft   
Plat  A general term for a flat area. The term plat was used to describe the flat area  for a horse whim  and also the floor that a Cylinders bed stone stood on (Cylinder plat). Plats also included areas excavated above or below ground to store ore or deads and the flat surfaces cut into hillside for building foundations.
Plug doorway  An engine house term. A plug doorway is the door at the  drivers floor level in the bob wall of an engine house. 
Portal  The entrance to an adit. Portals are often vaulted 
Prill An ore processing term. A  prill was a lump of pure ore  of that did not require any further concentration.
Purser  The cashier or mine paymaster