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The Leech A Prognosticator Of The Weather

Confine a leech in a large phial, three parts filled with rain water,
regularly changed twice a week, and placed on a window frame, fronting
the north. In fair and frosty weather it lies motionless, and rolled
up in a spiral form, at the bottom of the glass: but prior to rain or
snow, it creeps up to the top, where if the rain will be heavy and of
some continuance, it remains a considerable time; if trifling, it
quickly descends. Should the rain or snow be accompanied with wind, it
darts about its habitation with amazing celerity, and seldom ceases
until it begins to blow hard. If a storm of thunder or lightning be
approaching, it is exceedingly agitated, and expresses its feelings in
violent convulsive starts, at the top of the glass. It is remarkable
that however fine and serene the weather may be, and not the least
indication to change, either from the sky, the barometer, or any other
cause whatsoever, yet, if the animal ever shift its position, or move
in a desultory manner, so certain will the coincident results occur,
within thirty-six hours, frequently within twenty-four, and sometimes
in twelve; though its motions chiefly depend on the fall and duration
of the wet, and the strength of the wind.

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