A system of electrotherapeutics as taught by the International correspondence schools, Scranton, . of a piece of clean copper wire or a probe, wrapped withabsorbent cotton that has been moistened with a salt-solutionconsisting of 1 dram of common saltto 1 pint of distilled water. Cat-aphoresis requires special electrodesmade of different materials, such aspure copper or zinc. These will bespoken of later. 9. Incandescent Current. When the incandescent current isavailable, such an apparatus asshown in Fig. 11 will be found most-convenient and reliable for office-practice. A is a motor-gene
A system of electrotherapeutics as taught by the International correspondence schools, Scranton, . of a piece of clean copper wire or a probe, wrapped withabsorbent cotton that has been moistened with a salt-solutionconsisting of 1 dram of common saltto 1 pint of distilled water. Cat-aphoresis requires special electrodesmade of different materials, such aspure copper or zinc. These will bespoken of later. 9. Incandescent Current. When the incandescent current isavailable, such an apparatus asshown in Fig. 11 will be found most-convenient and reliable for office-practice. A is a motor-generator, ofwhich there are many 12 shows another are useful for operatingdrills, saws, etc. It generates analternating current. B is a doubleinduction-coil wound for a light atone end and for a cautery at theother. These coils have rack-and-pinion adjustment. With the use of such an instrument,which serves as a transformer, the necessity of a rheostat isobviated. C is a foot-plate, permitting the operator to makeand break connections at will without the aid of an Fig. 9An Easily Constructed Rheostat
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