This title needs explanation. This peculiar halo is not confined to the sea, nor to inanimate objects. The electric aureole has been frequently observed upon persons, and has always been considered a good omen. The Spartan Gylippus on his march to raise the siege of Syracuse, saw a star upon his lance and rejoiced at the token of divine favor. Nearly every tyro in Latin is familiar with the tale that Servius Tullius, when a child, was found asleep in his cradle with flames playing about him, and was in consequence educated like a prince, and became king of Rome. Stories of halos about Constantine the Great, and the Visigoth emperor Wamba, are also told. It is said that during Cæsar’s African war, flames sprang from the standards of the fifth legion during a stormy night: and at a time when Rome, almost in despair at the triumphs of Carthage and the death of two Scipios in Spain, was seriously meditating the abandonment of the contest, Lucius Marcius ventured upon a harangue to encourage the dispirited legions. While he spoke, a flame rested upon his helmet. Roused by the wonderful mark of divine favor, the Romans went forth yet again, and gained one of their greatest victories. What might have been the fate of the world if Carthage, not Rome, had prevailed? Who dare assert that an electric flame has not changed the destinies of the universe? But the earliest story of this sort comes from the famed expedition of the _Argo_, in search of the Golden Fleece. During a fearful storm Orpheus invoked the gods of Samothracia; and immediately divine lights appeared upon the heads of Castor and Pollux, two members of the party, and the storm ceased. So after death the two mythical heroes were promoted a place among the demi-gods, and became the especial patrons of sailors: and the strange lights on shipboard were supposed to indicate their presence. A single light, however, was supposed to bode evil, and to be the work of the mischief-making Helena. Since the extension of travel and scientific research, this phenomenon has been so frequently observed as to be no longer considered remarkable; and it is supposed to be due to electric clouds or currents coming in direct contact with objects, so that instead of the flash of lightning from a distance, there is a steady discharge, often with some hissing or crackling sound, noticeable at the brushes of any electric machine; in fact, the noise is seldom absent. It almost invariably appears before or after a thunder storm: and has hardly ever been observed during one. To this same cause must be attributed the occasional showers of luminous rain and dust.