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" Question 2d.
What are the most simple and economi-
cal means to employ for the composition and colouring of
the paste, and also of the enamel, and for the baking of the
materials ?
" Question 3d.
Is the purple precipitate of cassius (oxide
of gold, precipitated by the muriate of tin) preferable to any
other substance
for colouring the gums when they are re-
quired ? What is the manner of using it ?
" Question 4th.
Platina ; does it possess properties which
render it more suitable than any other metal, so that when
placed in the teeth it readily unites with them in the ba-
king?
"Question 5th. What are the mechanical means most
advantageous for mounting the teeth, and adjusting them in
the mouth, without injuring the firmness of the natural
teeth ?"
To resolve these questions, two memoirs were addressed
to the Society of Medicine ; one by Meggidro, of Nantz, the
other by M. Cornelia, of Turin. The former was honour-
ably noticed, but the society decided that the questions had
not been clearly resolved ; consequently, the society at that
time, found no person upon whom, for a clear elucidation

lime Question. Quels sont les moyens les plus simples et les plus econo-
miques a employer pour composer et colorer la pate ainsi que lemail et
pour les cuire.
lllme. Question. Le precipite pourpre de cassius (oxide d'or precipite
par muriate d'etain^ est-il preferable a toute autre substance pour colorer
les gencives au besoin ? Quelle est la maniere de I'employer.
IVme. Question. Le platine jouit il des propriel6s, qui le rendent plus
apte que les autres metaux, a disposer les dents de maniere a pouvoir elre
facilement reunies entrelles apres la cuisson ?
Vme. Question Quels sont les moyens mechaniques les plus avantaguex
pour monter les dents, et les ajuster dans la bouche, sans nuire a la soliditfe
des dents naturelles.