Therapeutic Electricity and Practical Muscle Testing

Strictly speaking, the term " therapeutic electricity" includes only the direct application of currents to the living body. The value of this book is, however, greatly increased by the author's wise decision to add a description of the electric cautery and the electric illumination of cavities. The work is divided into three parts. The first deals briefly with general principles?the definition of "pressure" and "potential," the statement and applications of Ohm's law, the measurement of E.M.F., and so forth. Incidentally, it is pointed out that the choice and arrangement of cells has important practical bearings. Dr. Hedley insists that the rapidity of vibration