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The capsules of the geranium furnish admirable barometers. Fasten the beard, when fully ripe, upon a stand, and it will twist itself or untwist, according as the air is moist or dry.
The capsules of the geranium furnish admirable barometers. Fasten the beard, when fully ripe, upon a stand, and it will twist itself or untwist, according as the air is moist or dry.