LEECH BAROMETER(posted 9671 days ago)Put a couple of LEECHES into a jar of water and watch their behaviour. If they lie quietly on the bottom, you can count on good weather. If they dash back and forth, the pressure is dropping and you may have rain.
Just more obscure information, I guess this is what happens when you read anything and everything. Supposedly, George Washington had a Leech Barometer.