Guaranine. C8 H10 N4 02. H2 O

Active principle of Guarana.

Crystalline; is identical with Caffeine. Dose, 1 to 5 grains.

Hurgunl balsam. Wood Oil. Gurjun Oil. Dipterocarpus Iavis. N.O. Dipteraceee.

Dark, clear, rather thin, reddish-brown, fluorescent oil. Has been used externally in skin diseases: is an anti-blennorrhagic, in doses of 15 to 40 drops.

"An admirable expectorant, in 1 drachm doses, 3 times a day, in chronic bronchitis." - Dr. W. Murrell, Lancet, 1890, p. 962.

The wood oil used in China and the East for painting, etc, is from the Tung tree, Aleurites cordata, N. 0. Euphorbiacece.

Gynocardia O Do Rat A

(See Chaulmoogra Oil.)

Hamamelin

Dark brown powdered extractive of Witch-hazel. Dose, 1/2 to 2 grains.

The liquid extract is in the 1890 add. to B. P. Dose, 2-5 m., used in Ung. Hamamelidis, 1 fluid part in 10 parts.

Haschisch

(See page 32.)

Hedera Helix

Ivy. N.O. Araliacea.

Hederine

A bitter alkaloid, allied to quinine in febrifuge quality. Ivy gum is a resinous exudation from bark of old trees, formerly used as a stimulant emmenagogue.

Hellebore In. C26 H44 O15

The Crystallizable Glucoside, from root of Helleborus niger, H. Viridis and H. Fatidus.

Freely soluble in water. Has the effects on the heart of Digitaline, as a cardiac stimulant, but is preferable, owing to its greater solubility, and consequent rapid absorption and elimination. Dose, i grain.

Helleborin. C36 H42 06

A second glucoside, little soluble: gives the narcotic properties; paralyses the nerve and brain.

Helenin

Inula Helenium. Indigenous. N. O. Composite.

A stearoptene, in white crystals, soluble in alcohol. It has antiseptic properties, arresting putrefaction.

TherapeUtics. Used externally for carbuncle, and internally in tuberculosis, diarrhoea, bronchitis, chorea, etc.

Dose: 1/6 to 1/3 grain, several times a day.