A laboratory manual of electrotherapeutics . ber of pointsof union of such metals were so arranged that alternatejunctions could be heated the E. would be increased. This istherefore a method whereby heat isdirectly transformed into electricenergy in the form of a direct cur-rent. The accompanying figurerepresents a thermo-electric gener-ator employing these principleswhich is capable of producing elec-tric currents of sufficient strengthand intensity for various practicalapplications. The heat furnishedby the combustion of gas flowingfrom an ordinary gas burner and the parts other than t
A laboratory manual of electrotherapeutics . ber of pointsof union of such metals were so arranged that alternatejunctions could be heated the E. would be increased. This istherefore a method whereby heat isdirectly transformed into electricenergy in the form of a direct cur-rent. The accompanying figurerepresents a thermo-electric gener-ator employing these principleswhich is capable of producing elec-tric currents of sufficient strengthand intensity for various practicalapplications. The heat furnishedby the combustion of gas flowingfrom an ordinary gas burner and the parts other than thepoints of junction of the dissimilar metals are kept cool byallowing a stream of water to flow through the generator tested in this laboratory has an E. M. 6 volts and furnishes a current somewhat exceeding3 amperes. The output of energy is subject to very slightvariations. The following are some of the therapeuticapplications to which such a source of electric energyfurnishing a current of this nature would be adapted:. Fig. 51. i58 LABORATORY MANUAL i. It would heat electric cauteries having com-paratively fine wires, or would light some of the jsmaller varieties of medicalexploring lamps. 2. It could be used toexcite a medical inductioncoil. 3. By employing a goodlow voltage electric motor itcould be used to run variousmechanical devices needed inthe physicians or dentists of-fice. Owing to the low E. of the current it could notbe conveyed through the tissues of the body so as to doeffectively any of the work which we have discussed underthe head of electrolysis, phoresis, or the physiologicalaction of the direct current.
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