_Tongues of fire._――This is a classic Hebrew expression for “a lambent flame,” and is the same used by Isaiah, (v. 24,) where the Hebrew is לשון אש (_leshon esh_,) “a tongue of fire;” ――commonly translated, simply “fire.” In that passage there seems to be a sort of poetical reference to the tongue, as an organ used in devouring food, (“as the tongue of fire devoureth the stubble,”) but there is abundant reason to believe that the expression was originally deduced from the natural similitude of a rising flame to a tongue, being pointed and flexible, as well as waving in its outlines, and playing about with a motion like that of licking, whence the Latin expression of “a _lambent_ flame,”――from _lambo_, “lick.” Wetstein aptly observes, that a flame of fire, in the form of a divided tongue, was a sign of the gift of tongues, corresponding to the Latin expression _bilinguis_, and the Greek διγλωσος, (_diglossos_,) “two-tongued,” as applied to persons skilled in a plurality of languages. He also with his usual classic richness, gives a splendid series of quotations illustrative of this idea of a lambent flame denoting the presence of divine favor, or inspiration imparted to the person about whom the symbol appeared. Bloomfield copies these quotations, and also draws illustrations in point, from other sources. My own opinion of the _nature_ of this whole phenomenon is that of Michaelis, Rosenmueller, Paulus and Kuinoel,――that a tremendous tempest actually descended at the time, bringing down clouds highly charged with electricity, which was not discharged in the usual mode, by thunder and lightning, but quietly streamed from the air to the earth, and wherever it passed from the air upon any tolerable conductor, it made itself manifest in the darkness occasioned by the thick clouds, in the form of those pencils of rays, with which every one is familiar who has seen electrical experiments in a dark room; and which are well described by the expression, “cloven tongues of fire.” The temple itself being covered and spiked with gold, the best of all conductors, would quietly draw off a vast quantity of electricity, which, passing through the building, would thus manifest itself on those within the chambers of the temple, if we may suppose the apostles to have been there assembled. These appearances are very common in peculiar electrical conditions of the air, and there are many of my readers, no doubt, who have seen them. At sea, they are often seen at night on the ends of the masts and yards, and are well known to sailors by the name which the Portuguese give them, “corpos santos,”――“holy bodies,” ――connecting them with some popish superstitions. A reference to the large quotations given by Wetstein and Bloomfield, will show that this display at the pentecost is not the only occasion on which these electric phenomena were connected with spiritual mysteries.