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XI. The Notes on Sculpture Index
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On the coining of medals (727. 728).The incombustible growth of soot on wicks reduced to powder, burnt tin and all the metals, alum, isinglass, smoke from a brass forge, each ingredient to be moistened, with aqua vitae or malmsey or strong malt vinegar, white wine or distilled extract of turpentine, or oil; but there should be little moisture, and cast in moulds.  349


18:349 : The meaning of scagliuolo in this passage is doubtful.

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