The leech weather-glass

A correspondent sent Hone the notes of a gentleman who kept a leech for years in an eight-ounce phial of water on his window frame, as a cheap weather glass. In settled fine weather, and in frost, it lay coiled at the bottom; before rain or snow it crept up to the top and stayed there until the weather settled. Before wind it raced round its bottle and seldom rested until it blew hard, and for some days before thunder it stayed almost wholly out of the water, writhing as if in great distress. The water was changed weekly in summer and fortnightly in winter.