Homemade Barometer

I have been using one of these for years. Calibrate by placing a marker
dot for a stormy day then another for a nice day. these will be the
reference points. From then on I can tell rise or fall of the air
pressure.

dyi-barometer2

The straw is taped to glad wrap secured to top of the can.

diy-barometer1

I finally got something a  little more accurate with numbers too 🙂

barometerhg

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