This section is from the book "Materia Medica And Therapeutics Inorganic Substances", by Charles D. F. Phillips. Also available from Amazon: Materia medica and therapeutics.
Sulphate of copper, either applied lightly in substance, or brushed over the affected part in strong solution, removes the white curdy deposit and induces healing of abrasions and ulcerations about the gums: 10 gr. mixed with about 1 oz. of honey is a good form for its use in children. Sir James Paget recommends a gargle contain-ing 1 to 2 gr. of sulphate in 1 oz. of water, as useful in salivation, free purging being secured at the same time (Medical Times, i., 1858). A similar lotion will destroy diphtheritic membrane.