Electro-physiology and electro-therapeutics : showing the best methods for the medical uses of electricity / By Alfred C. Garratt.
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The most wonderful magneto-electric machine, of which wc have heard, is the apparatus arranged by Mr. Henly, of Eng- land. In his machine there arc arranged two banks of per- Fig. 22. Magneto-Electric Machine, showing its revolving Double Armature. manent magnets, each of which is two feet and a half long, and five inches broad ; each is made of extra steel, which was long and laboriously hammered. The induction coils on the two arms of the ponderous revolving soft iron armature con- tain some six miles of insulated copper wire, and all this is driven with great velocity and regularity by machinery and steam power. It is said that the electric power of this apparatus far exceeds that of Rhumkorff 's coil; for the current obtained from the former is readily sufficient to kill a man or an ox instantly. The physiological effects of magneto-electric currents are produced on making, as well as on breaking, the circuit; but the latter are stronger than the former, yet not to so great a degree as between the make and break in the battery circuit of the electro-magnetic currents. Therefore, when employing Far- adaic currents for physiological and therapeutical purposes, we are allowed to take into the account merely the strongest cur- rent, i. e., those induced on opening the current of the battery in electro-magnetism, or on demagnetizing the armature in magneto-electricity.
Publication/creation
Boston : Ticknor and Fields, 1861.
Physical description
3 unnumbered pages, 716 pages, 2 leaves of plates : illustrations ; 26 cm
Contributors
Garratt, Alfred C. (Alfred Charles), 1813?-1891
Harvey Cushing/John Hay Whitney Medical Library
Notes
3d ed. has title: Medical electricity
Includes index and testimonials
Type/technique
Electronic books
Subjects
Electrophysiology
Electrotherapeutics
Attribution and usage
This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.
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