A manual of practical medical electricity - the Röntgen rays and Finsen light (1902) (14780530021)

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:

Terminals for /^Cautery or r^ J Spark Coils Fig. 75.—Diagram of Connections to Main for Cautery and X-RAV Coils. 124 A Manual of Practical Medical Electricity

Text Appearing After Image:

Fig. 76.—Milne Murray Switch-board. Faradic Electricity 125 In order to be able to conveniently vary the voltageand current-strength in the branch circuit which passesto the patient, one end of the branch wire is attached toa sliding piece C (Fig. 74), which can be moved along theresistance wire in the main circuit so as to make contactwith it at various positions. The voltage tapped off willvary with its position, and willbe at its maximum whenthe two ends of the branch wire are as far from one anotheras the sliding contact C will permit, but when C is near Bthe voltage will be small. This sliding rheostat is calleda volt-regulator, and it is usually constructed so as togive a range of from oi volts to 60 volts. An advantageof the lamp is that it serves to warn the operator that thecurrent is flowing, and that by exchanging it for one of adifferent candle power variations in the voltage and current-strength can be obtained. A precisely similar arrange-ment (Fig. 75) is used for hea

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1902

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