Guyton's 'Economical Laboratory', 1797.
© Science Museum / Science & Society Picture Library
Guyton's 'Laboratoire economique', 1797. Watercolour showing an experimental set up. Baron Louis Bernard Guyton de Morveau (1737-1816) was a French chemist who worked with Antoine Lavoisier (1743-1794) to reform chemical nomenclature, and showed that metals gain in weight on heating with air.