Cheltenham spa

Henry Thompson's Real Cheltenham Salts

Although Henry Thompson claimed to manufacture the salts by evaporating spa water, The Monthly Gazette of Health for 1 Sept 1819 claimed that the product was nothing more than Glauber’s salt (sodium sulphate decahydrate). The Gazette had “been informed, by a gentleman residing in Cheltenham, who could prove the fact, that many tons of common Glauber’s […]