The Spectroscope or Spectrophotometer or Spectrometer or Spectrograph, vintage engraved illustration. Magasin Pittoresque 1874.
Spectroscope or Spectrometer or Spectrophotometer or Spectrograph, vintage engraving. Old engraved illustration of Spectroscope.
Spectroscope or Spectrometer or Spectrophotometer or Spectrograph, vintage engraving. Old engraved illustration of Spectroscope of Joseph von Fraunhofer isolate