'Pneumostat' therapeutic inhaler used for the treatment of asthma, by Francis Riddell, London, England, 1934-1935.

Medical treatments breathed in from inhalers like this treated asthma. This lung condition causes shortness of breath, wheezing, coughing and difficulty in breathing. The inhaler is known as the ‘Pneumostat’. An electric compressor turns liquid medications into a fine mist for inhalation through a mouthpiece. These devices are now called nebulisers. They were introduced in the 1930s. The ’Pneumostat’ had an adjustable speed setting. It was made by Francis Riddell Limited in London and came in a carrying case for portability.