DOI Page / Citation link:
https://doi.org/10.11588/diglit.19571#0289
THE ARTIST'S ASSISTANT. 275
preferable, and makes the glafs of a harder fubftance
than that made of pebble
Bartholomew Korndorfer's fecret to make a dia-
mond of natural cryftal : — Take the bed polifhed
cryflal, no matter whether large or fmall, fo it is but
clear and tranfparent, put it in a crucible, with three
times as much of my fixed fulphur of gold, fo that
the cryftal may be covered all over with it, then,
after you have put a lid over it, and luted the cru-
cible well, let it for three days and nights anneal in
a ftrong fire, then take it out and quench it in fpring
water, in which red hot fteel is quenched forty-fix
times running, and you will have a diamond which,
refembles a natural one in every refped, and is right
and good.
Thus for Korndorfer, but as to his fulphur, he has
left us in the dark.
How to make a diamond out of a faphir, accord-
ing to Porta's defcription : — Weufe to make it, (the
diamond) the furelt way, in this manner; we filled
an earthen pipkin, or crucible, with quick lime, and
laid the faphir in the midft thereof, covering it firft
•with a tile, and then with coals all over, blowing
them gently until we had a clear fire ; for if it is
blown too much, it may occafion the breaking of the
{tone.
When we thought that the faphirliad changed its
colour, we let the fire go out of itfelf, and took it
out to fee whether it was turned white ; if fo, then
we laid it again in the crucible, in order to let it cool
with the fire ; but if it had not the right colour, then
we augmented the heat again as before, and looked,
often to fee whether the fire had taken away all the
M m 3 . colour,
preferable, and makes the glafs of a harder fubftance
than that made of pebble
Bartholomew Korndorfer's fecret to make a dia-
mond of natural cryftal : — Take the bed polifhed
cryflal, no matter whether large or fmall, fo it is but
clear and tranfparent, put it in a crucible, with three
times as much of my fixed fulphur of gold, fo that
the cryftal may be covered all over with it, then,
after you have put a lid over it, and luted the cru-
cible well, let it for three days and nights anneal in
a ftrong fire, then take it out and quench it in fpring
water, in which red hot fteel is quenched forty-fix
times running, and you will have a diamond which,
refembles a natural one in every refped, and is right
and good.
Thus for Korndorfer, but as to his fulphur, he has
left us in the dark.
How to make a diamond out of a faphir, accord-
ing to Porta's defcription : — Weufe to make it, (the
diamond) the furelt way, in this manner; we filled
an earthen pipkin, or crucible, with quick lime, and
laid the faphir in the midft thereof, covering it firft
•with a tile, and then with coals all over, blowing
them gently until we had a clear fire ; for if it is
blown too much, it may occafion the breaking of the
{tone.
When we thought that the faphirliad changed its
colour, we let the fire go out of itfelf, and took it
out to fee whether it was turned white ; if fo, then
we laid it again in the crucible, in order to let it cool
with the fire ; but if it had not the right colour, then
we augmented the heat again as before, and looked,
often to fee whether the fire had taken away all the
M m 3 . colour,