Anaesthetic inhalation ampoules, 1935-1949.
© Science Museum / Science & Society Picture Library
These crushable ampoules contain chloroform and are called 'Brisettes'. They are composed of glas with a protective wrapping of gauze and cotton wool and were made by Macfarlan and Co, Edinburgh and London, for use in midwifery. Billings and Sons Ltd, of Manchester, supplied them.