Cavendish's eudiometer, 1781. Replica of or
© Science Museum / Science & Society Picture Library
Cavendish's eudiometer, 1781. Replica of original in the posesion of the Royal Institution. The eudiometer is a graduated glas tube in which mixtures of gases can be made to react by an electric spark, used to measure changes in volume during chemical reactions. Henry Cavendish (1731- 1810) was an English natural philosopher and chemist. He attended Peterhouse College, Cambridge, but left without a degree. Having inherited a fortune from his uncle he lived as a recluse in London, devoting his life to scientific investigations.