heliographs (measuring devices)

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  6. measuring devices (instruments)
  7. [measuring devices for phenomena]
  8. meteorological measuring devices
  9. sunshine recorders
  10. heliographs
Scope note
Instruments that record the duration of sunshine and provide qualitative measurements of the amount of sunshine by the action of the sun's rays on blueprint paper.
heliographs
Accepted term: 18-Nov-2024