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510
paste which may serve for the base of incorruptible teeth,
already baked in the furnace of the porcelain manufacturer.
This paste is made very fusible by the addition of a solvent,
in order to be able to vitrify it in a furnace with a current of
air constructed in a chimney. See a description of this fur-
nace in his work, vol. i. page 128.
This is the formula he uses for this purpose
" Porcelain paste * 7 parts.
Calcined gypsum 1 part.
White sand - - - 1-30 of the mass.
Which oxide you please, 150 grammes by kilogrammes.
Grind perfectly.
See how M. Delabarre expresses himself in making appli-
cation of the following composition.
" I make use of the calliodontes very thin, and without
cramps, but they are first baked by a porcelain fire. I pro-
portion them in shape of the teeth on a grind-stone of stone :
therefore this is a kind of inlaid work. When I wish to
make a set of teeth with gums, I take of the above paste,
I place it on the model, and let it dry ; after that, I notch in
the front little hollow places, in which I resemble it to join-
er's work, which I size with a little gum-water; I insert a lit-
tle collar of paste, which I carve in imitation of the fes-
.
toons of the gums ; afterwards I put a light coat of porce-
lain coverings, equally melted with gypsum, and sometimes
with a little of the crystal of Mount Cenis.
" This joined work reunites with so much solidity in ba-
lling, that the percussion which would break the whole would
not separate one part from the others.
" It is well to assure oneself of the solidity of the smallest
sized pieces, in fixing upon them, before baking a base or
510
paste which may serve for the base of incorruptible teeth,
already baked in the furnace of the porcelain manufacturer.
This paste is made very fusible by the addition of a solvent,
in order to be able to vitrify it in a furnace with a current of
air constructed in a chimney. See a description of this fur-
nace in his work, vol. i. page 128.
This is the formula he uses for this purpose
" Porcelain paste * 7 parts.
Calcined gypsum 1 part.
White sand - - - 1-30 of the mass.
Which oxide you please, 150 grammes by kilogrammes.
Grind perfectly.
See how M. Delabarre expresses himself in making appli-
cation of the following composition.
" I make use of the calliodontes very thin, and without
cramps, but they are first baked by a porcelain fire. I pro-
portion them in shape of the teeth on a grind-stone of stone :
therefore this is a kind of inlaid work. When I wish to
make a set of teeth with gums, I take of the above paste,
I place it on the model, and let it dry ; after that, I notch in
the front little hollow places, in which I resemble it to join-
er's work, which I size with a little gum-water; I insert a lit-
tle collar of paste, which I carve in imitation of the fes-
.
toons of the gums ; afterwards I put a light coat of porce-
lain coverings, equally melted with gypsum, and sometimes
with a little of the crystal of Mount Cenis.
" This joined work reunites with so much solidity in ba-
lling, that the percussion which would break the whole would
not separate one part from the others.
" It is well to assure oneself of the solidity of the smallest
sized pieces, in fixing upon them, before baking a base or
