Wilbert Smith Archives Files Box 1131 19 1131-19-p055

Document Text (OCR)

5) The main piece is very similar in appearance to the residues produced in foundries when, after a mould has been filled, the excess metal remaining in the ladle is dumped into a hollow in a bed of sand, so that it will not solidify inside the ladle. This treatment is commonly known as "pigging"'. The rough bottom # and edges of the piece are similar to surfaces produced by molten metal penetrating sand. In addition, it is common to put a piece of pipe or rod in the hole before the metal is...