Making and Knowing
A minimal edition of BnF Ms Fr 640

[TOC] | [diplomatic]

- - - - - folio image: 012v - - - - -

Moulding stucco quickly

Grind & pulverize finely brick or Armenian bole or sanguine & incorporate it with melted wax, & thus melted, cast like the others on a relief medal, & thus you will have a cavity where you will be able to cast with plaster, crushed paper or terre chimolee.

at left top margin

Finely sieved brick is better, because the bole is too fat

Cleaning yellow pearls

Gently boil them in the bouteure of the goldsmith then, with tripoli & a piece of leather, sprinkled on the flesh side with the powder of the said tripoli, rub & polish the pearl.

For whitening enilanroc

Some think that the crust of ceruse color which is natural on top, others say that it is a secret of ancient lapidaries that is lost, others say that it is reheated enamel. And by means of the said crust, multiple ciphers, letters, circles st & other bizarre things can be formed. As for the method, I have practiced thus. Once I wished to give it a layer of arsenic ground on marble. However, I experimented without this, and I put the above said thing, enilanroc, in a small iron casket on the fire of my goldsmith’s forge with three or four small half—burnt coals, and blew only with my mouth. And, however, the thing came to redden & ignite & became all white, not only on its surface but also inside, & at that time I let it cool on its own near the fire, for otherwise, exposing it suddenly to cold air, it would have burst. Once all white, I passed it through my lead wheel of tin, where I found it as hard as before, & uncovering a little white, I found it a fair carnation. Finally, I polished it & saw that it took a very beautiful polish & could be compared to a very beautiful agate for cutting some beautiful face on it & bringing it on the a table of

[continued]