Three-prism spectrometer by John Browning
- maker:
- John Browning
Three-prism spectrometer by John Browning, London, in fitted wooden case, marked "Brit. Mus. (NH)/Min: Dep:/No.1
Three-prism spectrometer by John Browning, London, in fitted wooden case, marked "Brit. Mus. (NH)/Min: Dep:/No.1
