The proximity of Storms has been ascertained with accuracy by
various indications of the electrical state of the atmosphere. Thus
Professor Scott, of Sandhurst College, observed in Shetland that
drinking-glasses, placed in an inverted position upon a shelf in a
cupboard on the ground-floor of Belmont House, occasionally emitted
sounds as if they were tapped with a knife, or raised a little and
then let fall on the shelf. These sounds preceded wind; and when they
occurred, boats and vessels were immediately secured. The strength of
the sound is said to be proportioned to the tempest that follows.