These are preparations which are to be inhaled with steam or heated air. They are generally solutions of aromatic substances in alcohol, but when the physiological effect of alcohol is not desired, the substance is dissolved in glycerin or suspended in water by means of light carbonate of magnesium, e.g.:

In the second case put the magnesium carbonate in a mortar and triturate with the oil, then add the water gradually.

The following represent the quantities of medicaments for a single inhalation with a pint of water at 1400 F.:

Acetic acid 3j., glacial acetic acid 3j.

Aldehyde mx., water to 3j.

Amyl nitrite mij., S.V.R. to 3J.

Benzoic acid gr. iij., kaolin gr. xij., water Mix and add tincture of tolu mxviij., water to Benzoin : tr. benzoin. co. 3j. Camphor: spt. camph. mxv., S.V.R. mxx.

Carbolic acid (liquefied) mxx.

Chloroform 3ss., S.V.R. 3ss.

Creosote rnxx., light magnesium carbonate gr. iiss.

Cubeb oil mv., light magnesium carbonate gr. iiss.

Eucalyptus oil, miiss., light magnesium carbonate gr. 1 1/4.

Iodine tincture 3J.

Pine oil: ol. pin. sylv. m.v., mag. carb. lev. gr. iiss.

Sulphurous acid 3J.

Terebene mv., light magnesium carbonate gr. iiss.

Thymol gr. 3/4, S.V.R. m 7 1/2, light magnesium carbonate gr. 1/2