This section is from the book "A Text-Book Of Pharmacology, Therapeutics And Materia Medica", by T. Lauder Brunton. Also available from Amazon: A text-book of pharmacology, therapeutics and materia medica.
Native carbonate of zinc calcined in a covered earthen crucible at a moderate temperature, powdered and freed from gritty particles by elutriation.
Characters. - A pale pinkish-brown powder, without gritti-ness.
Solubility. - It is almost entirely soluble, with effervescence, in acids.
Officinal Preparation. Unguentum Calaminae (prepared calamine 1, benzoated lard 5).
Uses. - Used sometimes instead of oxide. In skin diseases preferred to the oxide by some, especially in weeping eczema; it is still better applied in the form of a lotion, e.g. calamine 40 grs., oxide of zinc 20 grs., glycerine 20 min., water to 1 oz., or prepared calamine 12 grs., prepared chalk 24 grs., lime water 1 oz.