A New Supplement...: H. Hematine. Haematoxylum lignum. Harlem blue. Hair dyes. Hamburg lake. Hassan's Dye. Hematin. Holly green. Hooker's Green. Hungary Blue. Hypericum.

A New Supplement to the latest Pharmacopoeias of London, Edinburgh, Dublin, and Paris, Forming A Complete Dispendatory, Conspectus, and Dictionary of Medical Chemistry, Giving All the Old and New Names, Including the New French and American Medicines, and Poisons; with Symptoms, Treatment, and Tests; as Well As Herbs, Drugs, Compounds, Veterinary Drugs, With the Pharmacopoia of the Vetenary College, Nostrums, Patent Medicines, Perfumery, Paints, Varnishes, And similar articles kept in the Shops; With Their Compositions, Imitations, Adulterations, And Medicinal Uses, Being a General Book of Formulæ and Recipes For Daily Reference in the Laboratory and at the Counter.
Fourth edition, corrected, improved, and very much enlarged.
By James Rennie, M. A., Editor of the Quarterly Journal of Foreign Medicine; the Pharmacopeia Universalis; Author of a Conspectus of Prescriptions in Medicine, Surgery, and Midwifery; the Pharmacopeia Imperialis, &c. &c.
London: Baldwin and Cradock. 1837.
London: Thomas Curson Hansard, Paternoster Row.

HEMATINE. New. The active principle of logwood, which consists of reddis-white crystals, brilliant and small, possessing an acrid, bitter taste, and slightly astringent.
Incompatible with gelatine, which precipitates it from its solutions, and with sulphuretted hydrogen.

HÆMATOXYLUM LIGNUM. L. E. D. Logwood, or Campeachy-wood, from the Hæmatoxylon Campechianum.It has little smell, and tastes somewhat astringent.
Incompatible with the mineral acids and the acetic acid, with acetate of lead, with the sulphate of alumine, with potassio-tartrate of antimony, and the sulphates of iron and copper.
Medicinally it is tonic in doses of 3j to 3ij of the decoction thrice or oftener a day in diarrhoæ, dysentry, &c. But I think its astringent effect is extremely doubtful. It often tinges the stools red or purple.
Enters into Ext. Hæmatoxyli. L.

HARLEM BLUE, a pigment similar to Antwerp blue, consisting apparently of ferro-sesqui-cyanide of alumina.

HAIR DYES. These depend upon the sulphuretted hydrogen evolved from the hair turining metallic preparations (chiefly nitrate of silver, trisnitrate of bismuth, diacetate of lead, and plumbite of lime) black or chlorine destroying the colour. See Orfila, Hassan, Grecian Water, Essence of Tyre, &c. Before applying these, the grease of the hair must be removed by washing it with solution of ammonia. (Orfila.)

HAMBURGH LAKE, a pigment of a deep purplish crimson, but not durable as a pigment.

HASSAN'S DYE. A solution of nitrate of silver, coloured with syrup of buckthorn.

HEMATIN. THe colouring principle of logwood.

HOLLY GREEN, or VERDETTO, a native pigment similar to Terre Verte.

HOOKER'S GREEN, a pigment similar to Antwerp green. See Green.

HUNGARY BLUE. A pigment prepared with cobalt.

HYPERICUM. St. John's Wort. Several of the species, particularly the H. perforatum and H. elegans, are much ujsed by the herbalists in vervous maniacal disorders; but though I believe them to have some powert from what I have seen, yet the effects are by no means distinctly ascertained. The leaves and flowers contain a colouring matter, and are sometimes used in dyeing. An oil of St. JOhn's wort is used by farriers, but what is sold for it is only olive oil and verdigrise.

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