Optics- crystals exhibiting interference colours. Coloured mezzotint [?] by R.H. Digeon, ca. 1883, after J. Silbermann
- from our story 'Le Monde Physique : Illustrating Scientific Phenomena Beautifully (1881)'
Optics- crystals exhibiting interference colours. Coloured mezzotint [?] by R.H. Digeon, ca. 1883, after J. Silbermann