I think this is the place for mentioning, that when the Count walked over the exciting soil, rod in hand, but trailing likewise, from each hand, a branch of the same plant, (which therefore touched the ground with one end, and with the other touched, in his hand, the magic fork,) the latter had lost its virtue. There is no motion when the ends of the divining rod are in direct communication with the soil. The intervention of the human body is necessary for our result. Then we are at liberty to suppose that the two sides of our frame have some fine difference of quality; that there is in general a sort of preponderance upon the right side; that in general, in reference to the divining rod, there is a superior vigour of transmission in the right side; that _this difference_, whatever it may be, of kind or degree, determines a current, causes motion, in the unknown fluid, which, in a simple arched conductor, with its ends upon the soil, remains in equilibrium. To explain the result of the last experiment I have cited of the Count de Tristan, no difference in quality in the two sides of the body need be assumed. Difference in conducting power alone will do. Then it might be said, that by covering the right handle of the divining rod, he checked the current rushing through the right side of the frame, and so gave predominance to the left current. One cannot help conjecturally anticipating, by the way, that with left-handed diviners, the divining rod will be found habitually to move the wrong way. But it will not do _now_, to let this indication of a curious physiological element pass slurred over and unheeded,--this evidence so singularly furnished by the Count de Tristan's experiments, of a positive difference between the right and left halves of the frame, as if our bodies were the subjects of a transverse polarity. I expect it is too late to pass over now any such facts, the very genuineness of which derives confirmation, from their pointing to a conclusion so new to, and unexpected by their observer, yet recently made certain through an entirely different order of phenomena, observed by one clearly not cognisant of the Count de Tristan's researches. I allude to the investigations of the Baron Freyherr von Reichenbach, published in Wohler and Liebig's "Annals of Chemistry," and already translated for the benefit of the English reader, and familiar to the reading public. I take it for granted, Archy, that you have read the book I refer to, and that I have only to bring to your recollection two or three of the facts mentioned in it, bearing upon the present point.