. Dental electro-therapeutics. Fig. 27 h. Dubois-Reymond coil. 88 ELECTRO-PHYSICS Mercury and electrolytic interrupters are now employed inlarge coils, for high-frequency and a;-ray work. The primarycells used for working small induction coils are the bichro-mate and Leclanche, one cell of the former or two of thelatter produce ample current for this purpose. Fig. 27 shows a Dubois-Reymond coil with a scale andadjustable interrupter for slow and quick vibrations, theprimary coil consisting of 700 turns of wire and the secondarycoil 5000 turns. DYNAMO CURRENTS. Continuous Current.—In speaking o
. Dental electro-therapeutics. Fig. 27 h. Dubois-Reymond coil. 88 ELECTRO-PHYSICS Mercury and electrolytic interrupters are now employed inlarge coils, for high-frequency and a;-ray work. The primarycells used for working small induction coils are the bichro-mate and Leclanche, one cell of the former or two of thelatter produce ample current for this purpose. Fig. 27 shows a Dubois-Reymond coil with a scale andadjustable interrupter for slow and quick vibrations, theprimary coil consisting of 700 turns of wire and the secondarycoil 5000 turns. DYNAMO CURRENTS. Continuous Current.—In speaking of the continuous currentit should be remembered that the current from dynamosis not truly continuous, being really a series of overlappingwaves, but these are, in a good machine, so slight thatit is usually known as continuous; strictly speaking con-tinuous current is obtained from batteries. The continuous current from the main, which constitutesa large proportion of the electric supply in commerce, ismade by converting mechanical pow
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