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170 The Floral King.
country-men an acceptable service by making this
generally known among us.
“To each and all who have voyaged at sea, it is
well known that the water which roars around the
ship, and causes the foam through the speed of the
vessel, is often luminous as if it were fire, which
men learned in Natural History have assigned to
various causes. Physici have given their opinion
that it is caused by an electric power; chemists
have thought it comes from the salt and its
phosphoric quality, but our author, Signor Doctor
. Vianelli, is the first who has correctly explained the
cause in his work.
“He has observed that the water in the bay at
Venice is luminous only from the beginning of the
summer until late in the autumn, particularly where
‘tang’ and sea-weed grow, and mostly where the
water is moved by waves, ships, or oars.
“The author took, in 1746, some such luminous
sea-water in a vessel and brought it home with him,
it was then no longer luminous, but when he splashed
it with his hand it immediately became luminous in
the dark. By daylight he scrutinized if any
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