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agate of various color. But because this total whiteness did not
respond to make this white crust on the surface that I was seeking,
leaving the rest of the thing of its natural color, I made a opening in
a brick of the exact size of the thing & put it inside. Then
I reddened two glassmaker's
solders, & as they were red, I
presented them one after the other onto the surface of the thing until I
got the white crust that I required, on which I made such drawing as I
wanted, uncovering up to the red base with a diamond
point, and I polished it with hog bristles
and tripoli. I do not know if it would be better to
reheat it under hot ashes, & if it would be good to encase it
in alabaster, which is very cold, as I encased it in the
brick.


Carnation from arsenic

Sublimated arsenic, that is to say, the white one that is
sold as stone, when ground on marble, mixed with
vermilion or lake or minium, makes a beautiful
flesh color that is always shiny. Yellow arsenic has a very
beautiful color, the white one is good in oil and agrees well
with the lake.


For dyeing

Mix sal ammoniac & vitriol & boil them
together. Then mix in lake or verdet & azure or
similar, & dye. This will not come off unless the animal
sheds. @Non bona.


Polishing of stones

Engraved tai stones are not polished on a
copper wheel, but with brushes and
tripoli. Yet stones cut in facets and flat are
polished on the said wheel.


Fine sieves of raw silk

One makes tammy of raw silk on a loom, to make
fine & delicate sieves. And for that effect, you must not
choose raw silk whitened by sulfur smoke, which
renders the silkchas charged with a sticky
vapor that would hold the flour & in the end would prevent it
from

