High Energy, Short Pulse Lasers

Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: THE MEDICAL USES OF HIGH-FREQUENCY CURRENTS BY DR. FREDERIC DE KRAFT New York City Veby few of our new remedial agents have attracted greater attention of the medical profession than currents of high frequency. With the rapid improvement in the apparatus there has also come to us a better understanding of...
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Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: THE MEDICAL USES OF HIGH-FREQUENCY CURRENTS BY DR. FREDERIC DE KRAFT New York City Veby few of our new remedial agents have attracted greater attention of the medical profession than currents of high frequency. With the rapid improvement in the apparatus there has also come to us a better understanding of the physical, as well as physiological, effects obtainable by these currents. Much of the mysticism that surrounded high-frequency currents in the past has been dispelled. When Oersted first discovered the principle of electromagnetic induction in 1821, when Faraday took up the further study of the phenomenon of induction, when Oepinus and Cavendish followed with their mathematical studies of the same, they little dreamed how important these would become in the development of future industries. Without the knowledge of electromagnetic induction, there would be no telephone and no wireless to assist us in transmitting messages over entire continents and over the seas. The principle of .induction plays a most important part in the production of high-frequency currents. The apparatus best adapted for this is a transformer. A static machine of large output has its own peculiar sphere, when certain pulsatory discharges, which properly belong to the category of currents under consideration, are desired. A coil with mechanical break has its field of usefulness and its advocates. The beginning of high-frequency currents may be said to be the memorable paper of Dr. William J. Morton, entitled Statical Electro Therapeutics, or Treatment of Disease by Franklinism. This was read before the New York Academy of Medicine on March 3, 1881, and published in the Medical Record, April 12, 1881. In it was described the static-induced current. He attached a Leyden jar to each of...