File:Practical electro-therapeutics and X-ray therapy - with chapters on phototherapy, X-ray in eye surgery, X-ray in dentistry, and medico-legal aspect of the X-ray (1912) (14734077616).jpg

Identifier: practicalelectro00mart (find matches)
Title: Practical electro-therapeutics and X-ray therapy : with chapters on phototherapy, X-ray in eye surgery, X-ray in dentistry, and medico-legal aspect of the X-ray
Year: 1912 (1910s)
Authors: Martin, James Madison, 1866-1947
Subjects: Electrotherapeutics X-rays Diagnosis, Radioscopic Eye Electric Stimulation Therapy X-Ray Therapy Ophthalmologic Surgical Procedures
Publisher: St. Louis : C.V. Mosby
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
nt positive. (5) Static Induced Current.—This current was first described byDoctor W. J. Morton in 1880. The prime conductors are con-nected with the inside coating of the Leyden jars and the patientwith the outside coatings by means of two conducting cords and 58 PRACTICAL ELECTRO-THERAPEUTICS AND X-RAY THERAPY electrodes. Fig. 27 represents this arrangement. A and B arethe prime conductors, Ll and L2 are the Leyden jars, El andE2 are the binding posts connected to the outside coatings of thejars, Gl and G2 are the conducting cords, HI and H2 are theelectrodes, and M is the patient. It is not necessary to placethe patient on the insulated platform. When the machine is started,electrons flow from the negative prime conductor B into Leydenjar L2, making it strongly negative. Electrons are forced awayfrom the outside coating of this jar through conducting cord G2and electrode H2 to the patient M. The electrons leave the pa-tient through electrode HI, conductor Gl, and binding post El,
Text Appearing After Image:
Fig. 27.—Static induced current. and to the outside coating of Leyden jar Ll, making it stronglynegative. The action of the static machine, already explained,takes the electrons from the prime conductor A and the insidecoating of Leyden jar Ll, making them strongly positive. Thestrength of this current is controlled by the speed of the revolvingplates and size of the Leyden jars. This current is oscillating incharacter, playing backward and forward through the patient be-tween the outer coatings of the Leyden jars. When a sparkjumps across the air gap from B to A, the positive charge on Ais momentarily neutralized by an addition of negative charges anda like momentarily weakening of the negative charges on B. Theincrease of the negative charges on A increases the negative charge ELECTROSTATICS 59 on the inside coat of Leyden jar Ll, while the discharge of B weak-ens the negative charges on the inside coating of Leyden jar L2.At this instant the electrons that have collected in consi

Note About Images