Thomas Beddoes, English physician and chemist, c 1808.
© Science Museum / Science & Society Picture Library
Engraving by Charles Turner Warren (1767-1823) published 1808, after a painting by Edward Bird (1772-1819). Beddoes (1760-1808) is best known for his work on the medical uses of gases. Whilst a physician at Clifton, Bristol, he set up the Medical Pneumatic Institute, and along with his asistant, Humphry Davy (who went on to invent the miner's lamp), discovered the anaesthetic properties of nitrous oxide (laughing gas).