_Celts._--The word “celt,” said to be derived from a doubtful Latin word signifying a chisel, is the name by which a particularly large and widely distributed class of weapons or implements is known. The word has no connection with the Celtic people, and should be pronounced “selt” and not “kelt,” as one frequently hears. The form of the celt is well known, inasmuch as many hundreds exist in our museums and private collections. They are found widely distributed in all parts of Europe, and generally throughout the known world, being regarded in many places in mediæval and even in modern times with superstitious reverence as thunderbolts with inherent mystical qualities. [Illustration: FIG. 2.--Stone celt with cutting edge.] The primitive celts occurring in England are simply flints roughly chipped into form with unsharpened edges, and are chiefly found in those counties where flint abounds. They are not, however, confined to them, but occur in other parts where flint is not abundant, being fabricated in a different material such as agate, quartz, granite, obsidian, clay-slate, greenstone, serpentine, and other rocks. These crude celts, being merely chipped out and very roughly formed, are at times difficult of recognition; they belong to the Palæolithic or earlier period of the Stone Age. The second development of the celt appears in the grinding of one edge so as to produce a cutting portion (Figs. 1, 2), the ruder ones simply having a serrated edge produced by being chipped. This grinding was doubtless executed by means of sand and water, and in scores of examples a remarkably even result has been obtained (Fig. 3). The third form in which the celt is polished all over is the highest development and the most recent (Fig. 4), and is classed in the Neolithic period. Some of these have ornamentation upon them in the form of ribs running longitudinally upon the sides, and some are bored with a circular or oblong hole. For use these celts were fixed transversely at the end of a haft of wood either by binding or by the wood being cleft for their insertion; in peace they performed all the offices which are associated with a hatchet, and in war those of a battle-axe. [Illustration: FIG. 3.--Celt with ground edge.] [Illustration: FIG. 4.--Stone celt with polished surface.]