Making and Knowing
A minimal edition of BnF Ms Fr 640

[TOC] | [diplomatic]

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Practica, cioè nova inventione di contegiare, stampata in Brescia per Vincenzo Sabio.

Emeralds of Brissac

I have taken minium, 26 , crystal and ground on marble 12 , verdet 3 |ʒ|. Incorporate all together, put in a crucible covered by another well luted that has a hole in the top. Fusion 7 hours without blowing. The mass has been of a beautiful green.

I have taken minium 12 , crystal 6 , verdet 2 grains. Fusion soft vi hours, cooked again 24 hours. The mass has been of green, yellow, & red.

Sapphire

Pebbles or crystal 8 , minium 16 , blacksmith’s salt 4 , sparkling coryal 4 grains. Fusion 6 hours.