CINCINNATI:
PRINTED BY HITCHCOCK AND WALDEN,
FOR THE AUTHOR.
1875.
Entered, according to Act of Congress, in the year 1869, by
Daniel Clark, A. M.,
In the Clerk's Office of the District Court of the United States for the
Northern District of Illinois.
In the summer of 1866, the author of this littlebook, moved by the repeated and earnest solicitationof his Medical Classes, prepared and printed a smallpamphlet entitled Practical Principles of MedicalElectricity, designed more particularly, as the presentwork also is, as a Hand-Book to assist the memoryof those who have taken a regular course of Lecturesfrom himself, or from some other competentinstructor in the same general system of Practice.The edition of that work was exhausted somewhatmore than a year ago. Still, the book has continuedto be frequently called for. The author has, therefore,prepared, and now offers to the Profession, thepresent volume, comprising the substance of theprevious work—corrected, improved in arrangementand form, and about doubled in size by the introductionof new matter. While he has reason for[iv]gratitude that the former manual, referred to above,has met with so favorable a reception, he can notbut hope that the present work will be found evenmore acceptable and valuable to both practitionersand their patients.
It is but justice to say that the most essentialprinciples of practice here presented did not originatewith the present author, but with Prof. C. H.Bolles, of Philadelphia, their discoverer, fromwhom the writer received his first introduction tothem. Yet, the explanations here given of the Lawof Polarization, as respects the electric current inthe circuit of the artificial machine, as well asrespecting the natural magnets and magnetic currentsof the human organism; the introduction ofthe long cord, with the explanation of its advantages;and also nearly everything of the philosophictheories here brought to view, the author alone isresponsible for.
This work, like its little predecessor from thesame pen, has been adapted exclusively to the use ofDr. Jerome Kidder's Electro-Magnetic Machine,manufactured and sold, at present, at No. 544 Broadway,New York; because the author, having used inhis own practice a considerable variety of the most[v]popular machines intended for therapeutic purposes,and having examined several others, believes this tobe incomparably the best in use. Dr. Kidder has,with most laudable zeal, pressed on his researchesand improvements in the manufacture of these instruments,until there seems to be scarcely anythingmore in them to be desired. They are certainly notequalled by any others in America, and probably notsurpassed, if equalled, by any in the world.