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RESORCIN. 539

where the system is much debilitated, and externally as an ingre-
dient ®f dentifrices, for its tonic and stimulating properties.

DENTAL FORMULAE.
For Facial Neuralgia from Dental p^^ Neuralgia from Dental Disturb-
Disturbaiice. atice.
Barrett. ^' ^^ ^- ^jOrgas.
R. Ferrietquin.(cit) . . ^ij R- Quininse sulphatis . . gr.x
^^"* sulphat. exsic. . gr.v
Syrup aurantii .
. . 5J
Acidi arseniosi . gr.ss
Aqua dest gj . .
Elixir calisayK ,^ij. M. Ext. nucis vomicae . .gr.v. M.
. . .
„ r- \. ^ • 1- Ft. pil. No. XX.
^
SiGNA.—Coch. parv. ter in die.
SiGNA.—One pill every four hours.
For Neuralgia Associated with
For Acute Periodontitis.
AnafIlia.
R. Quininse sulph. . . . ^ss
Garretson. Acidi sulph. aromat. . ^ij
R. Tinct. ferri chloridi . . _^j Elix. calisaya bark . . ^xiv. M.
Quininoe sulphatis M.
. . ^j. Signa.—A tablespoonful every two or
SiGN'A.—Teaspoonful four times daily. three hours.
For Acute Alveolar Abscess or Periodic Supra-orbital Neuralgia.
Cassidy.
R. Quinise sulphatis gr.xv
Ft. capsules No. 5.
SiGNA. —Take one every two hours.
RESORCIN.
Derivation.—Resorcin is a chemical compound of the phenol
group and aromatic series, to which carbolic acid belongs. It is
obtained from certain resins by the action of fusing alkalies, and
is in the form of tabular, prismatic, shining crystals, somewhat
sweetish to the taste, followed by a slight pungency. Resorcin
is very soluble in water, 95 parts in loO, and to a less degree in
alcohol, ether, glycerine and vaseline ; chloroform and carbon
sulphide will not dissolve it. It darkens on exposure to the air,
and is phosphorescent when rubbed in the dark. Its odor is
somewhat similar to that of phenol, but not so strong.