Medical electricity / By H. L. Jones ... Being the third edition of Medical Electricity, by W. E. Steavenson, M.D., and H. L. Jones, etc.

  • Steavenson, W. E. (William Edward), 1850-1891.
Date:
1900
Catalogue details

Licence: In copyright

Credit: Medical electricity / By H. L. Jones ... Being the third edition of Medical Electricity, by W. E. Steavenson, M.D., and H. L. Jones, etc. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    CHAPTER II. Fundamental Experiments and Definitions. Fundamental Experiments. Hypotheses of Fluids. Electroscopes. Conduction. Electric Quantity. Electromotive Force. Poten- tial. Electrometers. Electric Density. Capacity. Condensers. Leyden Jar. Contact electromotive force. Simple Voltaic cell or battery. Oersted's experiment. Magnetic field. Galvano- meters. Electromotive force. Resistance. Ohm's Law. Practical units. Specific resistance. Measurement of resist- ance. Electrolysis. Resistance of an electrolyte. Electro- magnetic induction. 5. Division of the subject.—It is usual for medical men to speak of electrical effects as if they were due to no less than three distinct kinds of Electricity. These we are accustomed to call Statical Electricity, the Continuous or Galvanic Current and the Interrupted or Faradic Current. This division, however con- venient it may be for purposes of medical treatment, has nothing to recommend it when the subject is looked at from a scientific point of view. The Science of Electricity may best be divided into four branches as suggested in Dr. Oliver J. Lodge's Modern Views of Electricity, a book which should be read with care by everyone who wishes to have definite and correct notions concerning the science. These four divisions are:— a. Electricity at Rest, or Static Electricity.—This branch coincides with that portion of the science generally treated of as Frictional Electricity.