Part 13

Distilled water, Oiv; Purified salt, ℥xij.

CARBOLIC ACID SOLUTION (5 PER CENT.).

Cold sterile water, gal. j; Carbolic acid (95 per cent.), ℥iv.

1: 20 SOLUTION GLYCERIN FORMALDEHYD.

Sterile glycerin, ℥viss (23 c.c.); Solution formaldehyd, Oj (500 c.c.).

SOLUTION (1: 1000) OF BICHLORID OF MERCURY (CORROSIVE SUBLIMATE).

Mercury bichlorid or corrosive sublimate, gr. xv (1 gm.); Common salt, gr. xv (1 gm.); Sterile water, Oij (1 L.).

The salt in this formula is added to prevent decomposition of the mercurial salt by the albuminous juices of the tissues.

ALKALINE SOLUTION OF CYANID OF MERCURY.

Some surgeons recommend cyanid of mercury in solutions of 1: 1000 or 1: 2000 in place of the bichlorid of mercury. It is a powerful antiseptic that does not coagulate albumin, irritate the tissues, or attack metals.

Mercury cyanid, gr. viiss (0.5 gm.); Sodium borate, gr. xv (1 gm.). These tablets are made to correspond to bichlorid tablets.

Compressed tablets, each containing 7½ grains (0.48 gm.) of corrosive sublimate with tartaric acid, are also in common use. One of these added to 1 pint of water makes a solution of 1: 1000.

SATURATED BORIC OR BORACIC-ACID SOLUTION.

Boric acid crystals, ℥jss (47 gm.); Hot sterile water, Oij (1 L.).

This solution may also be made by putting an excess of the crystals into the water, then sterilizing by boiling twenty minutes and straining through sterile cotton.

SOLUTION OF POTASSIUM PERMANGANATE.

This substance is used in a solution of royal blue or purple color, which should be freshly made. Place a few crystals in a piece of sterile gauze, and suspend in sterile water of the required quantity and temperature until the right color is obtained.

IODIN SOLUTION.

This solution is made by adding to sterile water of the required temperature sufficient tincture of iodin to make the color of sherry wine. Add the iodin a few drops at a time, stirring until the sherry color is produced.

SOLUTIONS OF FORMALDEHYD.

All the preparations on the market (formalin, formol, formolose, etc.) contain 40 per cent. of formaldehyd gas.

As the gas is the true germicidal principle, it is much the better plan, in stating the strength of dilute solutions of these preparations, to give the proportion of the gas present, and this is done in the formulæ below.

1 : 100 or 1 per cent. of True Formaldehyd Gas.

Solution of formaldehyd, fʒvj (23 c.c.); Cold sterile water, Oij (1000 c.c.). This solution is approximately equivalent to

1 : 500 or ⅕ per cent. Solution of Formaldehyd.

Solution of formaldehyd, ♏︎xxxviij (2.3 c.c.); Cold sterile water, Oj (500 c.c.)

THIERSCH’S ANTISEPTIC SOLUTION.

Saturated boric acid solution, Oj (500 c.c.); Sterile water, Oj (500 c.c.); Salicylic acid, gr. lxxv (5 gm.).