in June 1826, on the Malvern Hills, when two ladies were struck dead, it is stated, that the electric discharge appeared as a mass of fire rolling along the hill toward the building in which the party had taken shelter. Mr. Snow Harris remarks upon the difficulty of explaining these appearances on the principles applicable to the ordinary electric spark. The amazing rapidity of the latter, and the momentary duration of the light, render it impossible that they should be identical with it; but he conjectures that there may be a “glow discharge” preceding the main shock, some of the atmospheric particles yielding up their electricity by a gradual process before a discharge of the whole system takes place. In this view, the distinct balls of fire of sensible duration which have been perceived, are produced in a given point or points of a charged system previously to the more general and rapid union of the electrical forces—a supposition which will apply as well to the Mariner’s Lights, or St. Elmo’s Fire, observed during storms of thunder and lightning at sea. Pliny mentions lights noticed by the Roman mariners during tempests, flickering about their vessels, to which Seneca likewise makes allusion. By the superstitions of modern times they have been converted into indications of the guardian presence of St. Elmo, the patron saint of the sailor, hence called _cuerpo sante_ by the Spanish mariners. During the second voyage of Columbus among the West India islands, a sudden gust of heavy wind came on in the night, and his crew considered themselves in great peril, until they beheld several of these lambent flames playing about the tops of the masts, and gliding along the rigging, which they hailed as an assurance of their supernatural protector being near. Fernando Columbus records the circumstance in a manner strongly characteristic of the age in which he lived. “On the same Saturday, in the night, was seen St. Elmo, with seven lighted tapers, at the topmast. There was much rain and great thunder. I mean to say that those lights were seen which mariners affirm to be the body of St. Elmo, on beholding which they chanted many litanies and orisons, holding it for certain, that in the tempest in which he appears, no one is in danger.” A similar mention is made of this nautical superstition in the voyage of Magellan. During several great storms the presence of the saint was welcomed, appearing at the topmast with a lighted candle, and sometimes with two, upon which the people shed tears of joy, received great consolation, and saluted him according to the custom of the Catholic seamen; but he ungraciously vanished, disappearing with a great flash of lightning which nearly blinded the crew. [Illustration: Tower of St. Mark’s, Venice.]