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380 DENTAL MEDICINE.
Citroleine Dentifrice.
Dental Office and Laboratory.
IJ. Precipitated chalk Ibj
Powdered sugar ^ij
Powdered orris root ^iv
Cuttle-fish bone ^ ij
Bicarbonate of soda ij
J
Oil of lemon ^ ij. M.
Dentifrices may be pleasantly flavored with wintergreen, cassia,
sassafras, lemon, peppermint, anise, lavender, pennyroyal, cloves,
calamus, attar of roses, oil of neroli, oil of rose geranium, etc.
Cochineal coloring in small quantity will impart a pink color to a
dentifrice.

CROTON—CHLORAL HYDRAS.
HYDRATE OF BUTYL CHLORAL.
Formula.—Q^f:.\O.Yi^O.
Derivation.—Croton-chloral Hydrate is obtained by the action
of chlorine gas upon aldehyde. It is in the form of small, bril-
liant, white, silvery crystals of a sweetish taste, like that of mel-
ons. It is slightly soluble in water, and resembles hydrate of
chloral in its hypnotic effects ; but its action in this respect is not
so powerful, nor so certain. It differs from hydrate of chloral in
the singular property of causing anaesthesia of the head. To re-
lieve pain and induce sleep, the best effects are obtained from a
combination of the two agents.
Medical Properties and Action.—It is a sedative, hypnotic and
anaesthetic. It resembles chloral hydrate, but is not so certain in
its effects as a hypnotic. Its action commences in the head and
face.
Therapeutic Uses.—Croton-chloral hydrate is highly recom-
mended in dysmenorrhoea, sciatica, chronic cough, and in neu-
ralgia as an anodyne. One or two grains will relieve severe
neuralgia of the fifth pair of nerves ; it is frequently necessary,
however, to administer from five to fifteen grains, but it is not
safe to exceed this amount at one time. Croton chloral in five
or ten grain doses, in pill form, administered three times a day,