A non-surgical treatise on diseases of the prostate gland and adnexa . quality of the galvanic current depends largelyupon the cells used and the condition in which they arekept, while that of the faradic depends mainly upon theconstruction of the coil. In regard to the current astaken from the direct incandescent circuit, it is regular andinvariable. Apparati are also constructed by means ofwhich this current can be converted into great volume or 190 ELECTRO-PHYSICS. increased amperage, whereby it can be utilized for cauterypurposes. This is first accomplished by means of a motorso constructe
A non-surgical treatise on diseases of the prostate gland and adnexa . quality of the galvanic current depends largelyupon the cells used and the condition in which they arekept, while that of the faradic depends mainly upon theconstruction of the coil. In regard to the current astaken from the direct incandescent circuit, it is regular andinvariable. Apparati are also constructed by means ofwhich this current can be converted into great volume or 190 ELECTRO-PHYSICS. increased amperage, whereby it can be utilized for cauterypurposes. This is first accomplished by means of a motorso constructed as to convert the direct into an alternatingcurrent, thence from the alternate by means of a secondapparatus, called a transformer, into increased amperage,which can be used for cautery. The Faradic Currents. When a current from one or more cells passes around abar of soft iron through an insulated wire, it magnetizesthis bar or helix by induction. This remains magnetizedas long as the circuit is closed, but is immediately demag-netized when the circuit is Fig. XXV. Fig. XXV. illustrates the construction of a faradic bat-tery, from which we obtain the induced or faradic currents. By tracing the current from the carbon element c, fol-lowing the arrow up to the post, out to the point of thescrew, and from there down the spring a, to which isattached an insulated wire that passes up and around thebar of soft iron and back to z, we have a closed circuitwhich attracts the piece of iron attached to the spring ata and draws it to 6. In so doing it removes the spring ELECTRO-PHYSICS. 191 from the tip of the screw (as is shown by tlie dotted linec)and breaks the circuit at this point. The circuit beingbroken, the bar of soft iron becomes demagnetized, and,the induction in the coil of wire being severed, the springflies back to its former position. As soon as the springstrikes the point of the screw, the circuit is again closed;but also as quickl} broken when the bar of soft i
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