
~~~~~~~~~~~~~~~101v~~~~~~~~~~~~~~~


the crucible is red. Next, throw it on
marble, and you will have a substance white, hard &
even, like alabaster, with which you will be able to cast medals
which will resemble marble, but keep them out of the
humidity.


Jacinth

Is made like ruby, with gold; but one does not need
such a great fire. The ruby wants fire for a whole
day, and if it does not have enough fire, it will
only have red veins.



Always heat up your crucibles.





One holds that rubified antimony makes jacinth.




Topaz

I melted one part of pumice stone calcined & pulverized
& tr with three parts of minium
and the stone pulverized in a steelver
f mortar. It returned me a very beautiful
yellow, without any grains more yellow than any others. It is true that
it was well saturated with colour. I believe it would be better to
le pulverize the pumice in a glass
mortar, because it & the minium make enough yellow by
themselves. It returned to me a mass, the top a beautiful yellow, as was
said, the bottom like fire stone, without transparency. With
which, by mixing other


Varnish

The Germans make minium boil a lot in
linseed oil, & to give it the body of
varnish, they mix in very pulverized yellow amber.


Gum ammoniac

One puts it by small pieces into a little good vinegar, &
one heats, then one passes it through a cloth strainer. All
medicinal gums dissolve in vinegar.

