MYO: Barometer

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    • #239742
      BiggerPiggyBank

      Find a small pretty clear glass jar (with a cover)
      Add 2-3 tsps of pulverized alum then fill to the top with alcohol.
      In clear weather the liquid will be perfectly clear, but on the approach of
      rain, the alum will begin to spiral around the bottom of the jar, gradually
      clouding the whole bottle.

      submitted by Rhonda on ME Homeschool Discussion List

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