The spinal system of treatment with Coutts' Acid : Coutts' Hair Tonic. Public Domain Mark. Source: Wellcome Collection.
Advertisement issued by F. Coutts & Sons for Coutts' Acid, used as a remedy for neuralgia, indigestion, rheumatism, sciatica, and various dermatological conditions. Overleaf is an advert for Coutts' Hair Tonic, used in the treatment of dandruff.