Heliograph

{
  "id": "MLC-T-MET-006215",
  "term": "Heliograph",
  "field": "Meteorology and atmospheric science",
  "definition": "An instrument designed to record the duration of sunshine at a particular location. It typically consists of a glass sphere that focuses sunlight onto a specially prepared card, burning a trace as the sun moves across the sky. The length of the burn trace directly corresponds to the hours of bright sunshine.",
  "url": "https://mlchart.com/terminology/meteorology/heliograph/"
}