DOI Seite / Zitierlink:
https://doi.org/10.11588/diglit.19574#0015
A F R |
layer upon layer; put it into a furnace of live coals, and let it
ftand till the fulphur is wholly confumed ; then take it out, and
it will be of an iron grey, but reddifh within ; it gives a jiobie
fine tincture to glafs.
Another j^Es Ustum. Take thin plates of the reddeft cop-
per (i. e. the rofe copper) make it red-hot, and extinguifh it
in urine, in which common fait has been diffoived : Reiterate
this operation till it becomes of the colour of gold, both with-
in ana without; after which cement thofe places with this
powder. Or
Take fulphur, two pounds ; falt-petre, two pounds ; vitriol
calcined to rednefs, one pound ; reduce all to a powder ; put
the plates with the powder into a crucible layer upon layer;
cover it with another crucible having a hole in the bottom ;
lute them together, and, being dry, put them into a circulatory
fire (having hot embers underneath) for fix hours : For the firft
two hours let the fire be a foot diftant from the crucible, the
fecond two hours let it be half a foot from the crucible, and
the laft two hours let it be clofe to the crucible, and cover it.
Take care that the fire be not too violent, that the matter
may not meltj for, if it doesj it is fpoiled, When it is cold, re-
duce it to a fine powder, wafh it, dry it, and keep it for ufe.
There are other curious perfons who make an JEs Uftum
yet finer than this, and more penetrating in colours ; but the
preparation is more coftly, and acquires more time ; for, inftead
of brimftone and falt-petre, they make ufe of a purified ful-
phur, and fixed with fal-armoniac ; and inftead of ordinary red
vitriol they ufe Roman vitriol, which they prepare with the led
of urine, and a fufil fait; which they afterwards put into a re-
verberatory.
But fince the before mentioned will ferve well enough for
colouring glafs, and are eafier to make, I fhali omit giving the
preparation of this.
A. F. is a mark found in feme plates of Albert Durer.
AFFECTION} in painting, is defcribed like a comely an-
cient lady, winged^ holding in her hands a woodcock^ and
having a lizard at her feet.
Her age fhews fhe is conftant; winged, becaufe Affection 13
produced in an inflant; the cock and lizard are emblems of
good-will by inftincl: ; her pofture fhews, that benevolence be-
tween two, for a long time, becomes at laft one true friendfhip.
AFRICA, is reprefented by a black woman, almoft nakedj
having frizzled hair, tri elephant's head for a creff, a necklace
of coral, and pendants of the fame ; at her car a fcorpion j
holding in her right hand a cornucopia, with ears of corn in
feer left hand t a fierce lion by her on one fide, and a viper and
B .2 lerpenfs
layer upon layer; put it into a furnace of live coals, and let it
ftand till the fulphur is wholly confumed ; then take it out, and
it will be of an iron grey, but reddifh within ; it gives a jiobie
fine tincture to glafs.
Another j^Es Ustum. Take thin plates of the reddeft cop-
per (i. e. the rofe copper) make it red-hot, and extinguifh it
in urine, in which common fait has been diffoived : Reiterate
this operation till it becomes of the colour of gold, both with-
in ana without; after which cement thofe places with this
powder. Or
Take fulphur, two pounds ; falt-petre, two pounds ; vitriol
calcined to rednefs, one pound ; reduce all to a powder ; put
the plates with the powder into a crucible layer upon layer;
cover it with another crucible having a hole in the bottom ;
lute them together, and, being dry, put them into a circulatory
fire (having hot embers underneath) for fix hours : For the firft
two hours let the fire be a foot diftant from the crucible, the
fecond two hours let it be half a foot from the crucible, and
the laft two hours let it be clofe to the crucible, and cover it.
Take care that the fire be not too violent, that the matter
may not meltj for, if it doesj it is fpoiled, When it is cold, re-
duce it to a fine powder, wafh it, dry it, and keep it for ufe.
There are other curious perfons who make an JEs Uftum
yet finer than this, and more penetrating in colours ; but the
preparation is more coftly, and acquires more time ; for, inftead
of brimftone and falt-petre, they make ufe of a purified ful-
phur, and fixed with fal-armoniac ; and inftead of ordinary red
vitriol they ufe Roman vitriol, which they prepare with the led
of urine, and a fufil fait; which they afterwards put into a re-
verberatory.
But fince the before mentioned will ferve well enough for
colouring glafs, and are eafier to make, I fhali omit giving the
preparation of this.
A. F. is a mark found in feme plates of Albert Durer.
AFFECTION} in painting, is defcribed like a comely an-
cient lady, winged^ holding in her hands a woodcock^ and
having a lizard at her feet.
Her age fhews fhe is conftant; winged, becaufe Affection 13
produced in an inflant; the cock and lizard are emblems of
good-will by inftincl: ; her pofture fhews, that benevolence be-
tween two, for a long time, becomes at laft one true friendfhip.
AFRICA, is reprefented by a black woman, almoft nakedj
having frizzled hair, tri elephant's head for a creff, a necklace
of coral, and pendants of the fame ; at her car a fcorpion j
holding in her right hand a cornucopia, with ears of corn in
feer left hand t a fierce lion by her on one fide, and a viper and
B .2 lerpenfs