POLARITY OF THE HUMAN BODY. Mr. H. Durville, Director of the “Journal du Magnétisme,” published in Paris, France, has made some very interesting experiments which have led him to fix the exact Polarity of the Human Body. To understand well what I am going to state, it is necessary to know first that the French call the South pole of the Earth, Austral, and the North pole, Boreal, and that they call the end of the compass needle or of a Magnet which is attracted to the North of the Earth, Austral, and the end which is attracted to the South, Boreal. Mr. Durville has replaced the denominations Austral and Boreal by the terms positive and negative, based on the following Electro-Chemical law. If a Saline solution be submitted to the action of a Voltaic current, the acids go to the pole +, or positive and the alkalis to the pole-, or negative. Also if we put in the water contained in two different glasses, the two electrodes of a pile, uniting the two glasses by a wet woolen or cotton thread, the water in the glass exposed to the electrode +, will take a fresh and acidulated taste, and the water in the other glass exposed to the electrode-, will take an alkaline, tepid and unsavoury taste. Now, if we submit two glasses filled with water to the poles of a Magnet, the water exposed to the Austral pole will take an acidulated taste, and the water exposed to the Boreal pole will take an alkaline taste. There is, then, a concordance of nature between the positive or + pole of the pile, and the Austral or positive pole of the Magnet, both being fresh and acids; and between the negative or-pole of the pile, and the Boreal or negative pole of the Magnet, both being tepid, nauseous and alkaline. Consequently we can call +, or positive, the Austral pole of the Magnet and-, or negative, the Boreal pole. Furthermore, if we magnetize two glasses of water, one with the right hand, and the other with the left hand, the first will become acidulated and fresh, and the second, tepid, nauseous and alkaline. Then, there is again concordance of nature between the positive or + pole of the pile, the positive or Austral pole of the Magnet, and the right hand, which are fresh and acidulated; and between the negative or-pole of the pile, the negative or Boreal pole of the Magnet, and the left hand which are tepids, nauseous and alkalines. Consequently we can call positive or +, the right hand and the Austral pole of the Magnet, as well as the positive pole of the pile; and negative or -, the left hand and the Boreal pole of the Magnet, as well as the negative pole of the pile. We know that the Earth is a Magnet and that it acts like one. We also know that when Magnets act freely one upon another, the poles of the same name are repulsed and the poles of contrary names are attracted.