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Dear Sir:
—You have kindly opened your valued pages to me, which I deemed necessary to protect American Electro-therapy from ridicule. I have called attention to the error, and that ends the matter as far as I am concerned, but I beg again for space, not to answer the personal attack made upon me, as that is neither of interest or importance, but to add another word to the subject of galvanic measure, that your readers may understand why I have spoken so positively.In this progressive age it may seem bold to the superficial observer to say, " that no one ever has used, or ever will use a certain remedy without danger," but the electric current is a force so well known in certain respects, and so exactly measurable, that we can draw the line with assurance; and I am no more a prophet in saying that ten ampères