Acid Gynocardic. C14 H24 O2

Crystallizing in plates: Dose, 1/2 to 1 grain. The active principle of Chaulmoogra Oil, which see.

Acid Hippuric. HC9H8N03

This acid, made from horses' and cows' urine, forms salts which are used in gouty temperaments: such are Lithium Hippurate C9.H8 L N03.

Calcium Hippurate C18 H16 Ca N2 06 + 3 H2 0.

Sodium Hippurate C9 H8 Na NO3 + H2 0.

These Hippurates have been used with advantage in gout and gouty rheumatism; they are supposed to replace Urates in the system, than which they are more soluble and more easily eliminated, see page 67.

Dose: 10 to 15 grains of either of above salts.

Acid Hydriodic. H I In Solution

Useful in asthma where iodine is to be given. Best administered in Syrup. Dose of latter, 1 to 2 drachms in water, before meals.

Periodate. The powdered crystals of this substance are without odour or colour, and partly soluble in water. Believed to contain iodic acid and periodic acid and lime. An antiseptic, said to be fatal to micro-organisms of disease; recommended for influenza. Dose: 2 to 10 grains.

Acid Hydrofluoric. H F In Solution

A solution of about 25 to 30 % of the gas. The dilute acid contains 1/2 per cent, of this solution: dose of dilute acid, 15 to 20 drops. Successful in goitre. A spray, 1 to 3 or 10 of water, has been used in phthisis. Fluorine has lately been isolated with great difficulty by M. Henri Moissan: it energetically attacks all known substances. "Salufer" or Sodium Silico-fluoride is said to be an efficient non-irritating antiseptic, but dangerous internally. - Brit. Med. Journ., 15-2-90.

Acid Oxy Naphthoic Alpha. C10 H6 OH COOH

Obtained by the action of carbonic acid on an alkaline salt of a naphthol. Colourless crystals, soluble in alcohol but not in water. A powerful toxic antiseptic; used especially for scabies, in a 5 % ointment.

Acid Phenyl-Acetic. C6H5CH2COOH

White lustrous plates, with strong disagreeable taste and smell. Soluble in hot water and alcohol. An internal antiseptic for phthisis. Dose, 1 to 3 grains, or 10 drops twice daily (in water) of a solution in alcohol, 1 part in 5.