#prism_spectroscope__prismspectroscope__spectroscope  an optical instrument for spectrographic analysis
  supertype:  optical_instrument__opticalinstrument  an instrument designed to aid vision
  part:  collimator  optical_prism
  subtype:  mass_spectrometer__spectrometer  spectroscope for obtaining a mass spectrum by deflecting ions into a thin slit and measuring the ion current with an electrometer
     subtype:  mass_spectrograph  a mass spectrometer that produces a graphical representation of the mass spectrum
  subtype:  spectrograph  a spectroscope by which spectra can be photographed
     subtype:  sound_spectrograph__soundspectrograph  a spectrograph for acoustic spectra

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