Making and Knowing
A minimal edition of BnF Ms Fr 640 in English Translation

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Emeralds of Brissac


I took minium, 26 , crystal […] and ground on marble 12 , verdigris 3 |ʒ|. Incorporated all together. Put in a crucible covered by another well luted crucible with a hole on top. Melting: 7 hours without blowing. The mass came out a fine green.

I took minium, 12 , crystal, 6 , verdigris, 2 grains. Melting: moderate, vi hours, baked 24 hours. The mass came out green, yellow and red.