727.

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Sacred Texts Age of Reason
XI. The Notes on Sculpture Index
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The Da Vinci Notebooks at sacred-texts.com

727. POWDER FOR MEDALS.

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

Footnotes

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

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