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BORACIC ACID. 211

Boric Lint is made by steeping lint in a saturated solution of
boric acid at the boiling point.
Dose.—Of boric acid, gr. viij to xvj. It does not cause any
disturbance of the stomach, and is eliminated in the urine.
Boro-glyceride is composed of boric acid 62 parts, and glycerine
92 parts, each gently heated over a water bath and the boric acid
gradually added to the glycerine, and the heat continued until
54
parts, or three molecules of water are driven off. It is amber-
colored and very friable, and proves to be a valuable antiseptic.
Boro-glycerine has an acid, pungent taste, and an astringent
effect on mucous membranes, and is free from some of the ob-
jections to the use of the boric acid powders. (See Glycerine
for Glyceroborates of Sodium and Calcium.)
Boric Ointment is composed of boric acid, I part paraffin, 2
;
parts ; almond oil, 2 parts. When used it should be mixed with
a little glycerine.
Mel Sodii Boratis—Honey of Borax— is composed of borax, 60
grains ; honey, i troy ounce.
Borolyptol.—Antiseptic and germicidal. Composed of aceto-
boro-glyceride, formaldehyde, pinus pumilis, eucalyptus, myrrh,
storax and benzoin. Employed externally and internally. Dose
for internal use, oij-
Dental Uses.—Boric acid may be employed as an antiseptic in
all the forms and combinations in which carbolic and salicylic
acids are used, and when it is combined with sulphite of soda the
compound forms a valuable preparation for bleaching discolored
teeth. (See Sulphite of Soda.)
Boric acid in a ten per cent, solution, may be used with benefit
in the form of an injection into suppurating cavities, necrosis and
caries of bone, etc. As a mouth-wash and gargle it is employed
in a solution composed of twenty grains to the ounce of water.
Combined with glycerine in the form of boro-glyceride, a valuable
application is secured for antiseptic dressings and injections.
One part of boric acid in 130 of water is used as a germicide.
For the sterilization of mucous surfaces a saturated aqueous
solution is commonly employed. Boric acid is also an ingredient
of some dentifrices.