A manual of practical medical electricity - the Röntgen rays and Finsen light (1902) (14597021239)

Identifier: manualofpractica00turn (find matches)

Title: A manual of practical medical electricity : the Röntgen rays and Finsen light

Year: 1902 (1900s)

Authors: Turner, Dawson

Subjects: X-Rays Electrophysiology Electrosurgery Electric Stimulation Therapy Electrotherapeutics X-rays Electrophysiology Electrosurgery

Publisher: New York : William Wood & Company

Contributing Library: Francis A. Countway Library of Medicine

Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

Text Appearing Before Image:

Fig. 90.—Dr. Spamers Induction Coil, generates a current of more than 13,000 alternations persecond. This current is passed through an inductioncoil of high insulation (oil), in the circuit of the secondarywire of which is a battery of Leyden jars, which, by theoscillating character of their discharge, produce the enor-mous frequency of alternations. Similar effects on a humble scale may be produced andstudied by means of the following apparatus (ElihuThompson). To the secondary terminals of a large Ruhmkorffscoil (my own gives a ten-inch spark) are attached thick, High Potential Electricity 145 well-insulated wires, the one of which passes to the knobof a medium-size Leyden jar, and the other to its outercoating. The first wire is now carried on to terminate inthe knob of a metal discharger ; the second onejs__coiled

Text Appearing After Image:

o Cu to form a spiral of about ten turns, which is placed inside^a glass tube, such as a lamp-chimney, around which a well-insulated fine wire is coiled. The thick wire, after travers-ing the glass tube, is attached to the other limb of thedischarger (Fig. 93). 10 146 A Manual of Practical Medical Electricity The lamp-chimney and enclosed wire spiral are nowimmersed in a glass vessel half filled with petroleum ; theextremities of the fine wire coiled upon the chimney arebrought up to a convenient height in glass tubes ; the

a manual of practical medical electricity book illustrations medicine medical illustrations medical history electric power history of technology electricity x ray rontgen medical therapy electrotherapeutics images from internet archive

1902

Open Knowledge Commons and Harvard Medical School

http://commons.wikimedia.org/

public domain