Baroscope
an instrument showing roughly the variations in atmospheric pressure.
historical examples
in my baroscope, i have never found the quicksilver higher than 30.
philosophical transactions of the royal society – vol 1 – 1666 various
sometimes (i say not often) the baroscope yields not to other very great changes of the air.
philosophical transactions of the royal society – vol 1 – 1666 various
noun
any instrument for measuring atmospheric pressure, esp a manometer with one side open to the atmosphere
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