V. ELECTRICITY, ETC.--Electro Mania. By W. MATTIEU WILLIAMS.--Example of electrical exaggeration and delusion.--Early scientific attempts at electro-motors, electric lamps, etc. Action of Magnets Upon the Voltaic Arc. By TH. DU MONCEL. 2 figures. Volckmar's Secondary Batteries. * * * * * METAMORPHOSIS OF THE DEER'S ANTLERS. Every year in March the deer loses its antlers, and fresh ones immediately begin to grow, which exceed in size those that have just been lost. Few persons probably have been able to watch and observe the habits of the animal after it has lost its antlers. It will, therefore, be of interest to examine the accompanying drawings, by Mr. L. Beckmann, one of them showing a deer while shedding its antlers, and the other as the animal appears after losing them. In the first illustration the animal has just lost one of its antlers, and fright and pain cause it to throw its head upward and become disturbed and uneasy. The remaining antler draws down one side of the head and is very inconvenient for the animal. The remaining antler becomes soon detached from its base, and the deer turns--as if ashamed of having lost its ornament and weapon--lowers its head, and sorrowfully moves to the adjoining thicket, where it hides. A friend once observed a deer losing its antlers, but the circumstances were somewhat different. The animal was jumping over a ditch, and as soon as it touched the further bank it jumped high in the air, arched its back, bent its head to one side in the manner of an animal that has been wounded, and then sadly approached the nearest thicket, in the same manner as the artist has represented in the accompanying picture. Both antlers dropped off and fell into the ditch. [Illustration: METAMORPHOSIS OF DEER'S ANTLERS.--FIRST STAGE.]