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PREPARED CHALK.

astringents, such as laudanum and tincture of kino or of catechu,
in the treatment of diarrhoea. Dose, 5j to oSS.
Dental Uses.—Prepared chalk is used in dental practice chiefly
for its antacid property, and generally as an ingredient of den-
it
tifrices ; is also employed in the form of powder as an antacid
in acidity of the oral fluids, for which purpose it is rubbed be-
tween the teeth and permitted to remain during the night ; it is
also employed to obtund the sensitiveness of dentine, on account
of its absorbent and antacid properties; for such a purpose it
should be applied repeatedly, for several days, to the sensitive
surface. In the dental laboratory it is used as a polishing powder
for metal and plastic work ; also for polishing the surfaces of
gold fillings. The precipitated chalk of the Pharmacopoeia is
the preparation to be preferred on account of its freedom from
gritty particles.
DENTAL FORMULA.

Dentifrice in the form of Troches. Dentifrice.
R Gretas praeparatoe . ib.iv Am. Dent. Association.
Sodii boratis (pulv.) l^
Saponis Castil " l^ R. Cretae praeparatae . Ibiij
Sacch. albse " Ib.iss Pulv. cinchonse . . ftj
Ossis sepise " lb.iX Pulv. radicis iridis ftj
Olei rosas .... gtt.xxx Pulv. sacchari albi tbiss
Millefleurs .... Pulv. saponis cas. .
I)
1%
Essentiae jasmin Sodi carb
Olei sassafras gtt.lxxx.
Mix with a solution of gum syrup. . . .
Dentifrice in the form of Camphorated
Paste. Dentifrice.
Keller Medicine Co.
Am, Dent. Association.
Pts. by Wt.
R. Magnes. carb. . 2 R. Cretae praep tbiij
Glycerini . . I Pulv, Cinchonas . . . Ibj
Potas. chlorat. 3 Pulv. radicis iridis , tbj
Tr. camphora I Pulv, sacchari albi Ibiss
01. gaultherise q.s. Pulv. saponis cas. . t^]
Cretae praep. . q.s. Sodii carb ^j
To make desired number of parts. Glycerini f J 'U
Syr. simplic q.s, M, Mellis q. s.
To make a thick paste. And form into a paste.