It is recommended to dissolve the crystallized Carbolic Acid (Calvert's) in the proportions of one part by weight of the acid to six of glycerine (forming Carbolate of Glycerine). In this state it can be conveniently diluted to any degree of strength.

In general a dose of Carbolic Acid is one grain in an ounce of water.

As a gargle, one or two grains to an ounce of water.

As an injection, one grain to four ounces of water.

As a lotion, fifteen grains to an ounce of water.

As an ointment, sixteen grains to an ounce of benzoated lard.

As a liniment, one part to twenty of Olive Oil.

As a plaster, one part of Carbolic Acid to three parts of Shellac.

The crystallized Carbolic Acid is to be used as a caustic.

As Antiseptic Oil for abscesses, one part of Acid to four of boiled Linseed Oil.

Sick-rooms to disinfect: place a portion of the dissolved crystals in a porcelain dish, and float it in a larger vessel of hot water.

For disinfecting purposes generally: one pound of crystals to six gallons of water.

For drains: one pound of the fluid Carbolic Acid to five gallons of warm water.

Toothache is often cured with one drop of Carbolate of Glycerine; and diarrhoea arrested in half an hour with two drops in a wineglass of water.

These are the doses and preparations recommended by the British Pharmaceutical Conference.

Black Drop

A preparation under this name has long been in use by the medical profession. Its preparation was long kept a secret, but it was found such a valuable preparation that several attempts have been made to imitate it, not altogether successfully. At least, a patient who had taken the genuine Black Drop for some time, could tell the difference, no matter how the substitute was disguised.. The following is supposed to be the mode of preparation. "Take of Opium half a pound; Verjuice (juice of the wild crab) three pints; nutmegs an ounce and a half, and Saffron half an ounce, boil them to a proper thickness, then add a quarter of a pound of sugar and two spoonfuls of yeast. Set the whole in a warm place near the fire, for six or eight weeks, then place it in the open air till it becomes a syrup; lastly decant, filter and bottle it up, adding a little sugar to each bottle. One drop is considered equal to three of the Tincture of Opium.