Fortin barometer

{
  "id": "MLC-T-MET-005727",
  "term": "Fortin barometer",
  "field": "Meteorology and atmospheric science",
  "definition": "A type of mercury barometer designed for high precision, featuring a cistern with a flexible leather bottom and an adjusting screw. This mechanism allows the mercury level in the cistern to be set precisely to a fixed ivory point before each reading. It provides accurate atmospheric pressure measurements, often used as a standard for calibrating other barometers.",
  "url": "https://mlchart.com/terminology/meteorology/fortin-barometer/"
}