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sdo:abstract
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"How to lay gold. Take gypsum and grind it weil with water. Then take your glue, which should be made from the gelatinous parts of a buil, and mix with it an equal quantity of white of egg, and temper the gypsum with this mixture. And w herever you wish to lay the gold, spread some of this gypsum with a brush and leave it to dry. Do this three times, and then scrape it smooth, and burnish it. Then lay some of the glue upon it, and on that lay the gold, pressing it down gently with a bit of cotton: and so set it aside to dry. And if you wish to polish it, polish it with a bloodstone or with a dog's tooth."
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