. The medical and surgical uses of electricity : including the X-ray, Finsen light, vibratory therapeutics, and high-frequency currents . w. The double-cell selectors allow the operator to select any cell orcells within the circles, and to use them uniformly. 28o ELECTRO-THERAPEUTICS. They are provided with broad flange bottoms, and, when selecting ad-ditional cells, these slide from one button to another, always resting onone before leaving the other, so that a gradual increase of the current isinsured wdthout the possibility of a shock. The rheostat has Germansilver wire coils of from 5 to 5
. The medical and surgical uses of electricity : including the X-ray, Finsen light, vibratory therapeutics, and high-frequency currents . w. The double-cell selectors allow the operator to select any cell orcells within the circles, and to use them uniformly. 28o ELECTRO-THERAPEUTICS. They are provided with broad flange bottoms, and, when selecting ad-ditional cells, these slide from one button to another, always resting onone before leaving the other, so that a gradual increase of the current isinsured wdthout the possibility of a shock. The rheostat has Germansilver wire coils of from 5 to 5,000 ohms resistance, a total resistance of17,000 ohms, and may be used in connection with the meter to measurethe resistance of the patient or to test the condition of the cells. Themeter is a vertical form, which is unaffected by magnetic influences, andtherefore does not have to be adjusted. It has a scale of double values,and measures from one to flve hundred milliamperes. This is placed ona bracket in the top of the cabinet, and is easily read from a automatic rheotome gives graduated interruptions of the galvanic. Fig. 66.—Plug and Socket Galvanic Battery (Waite & Bartlett). current. It is constructed on the principle of a clock, and is operated bya strong spring that is not liable to get out of order. The water rheostat may be used to gradually modify the current fromany series of cells. For the use of the no or 120 volt direct current the Kennelly adapter(Fig. 70) is a very complete, compact, and satisfactory apparatus. It con-sists of a hard-rubber cylinder, upon which is wound in suitable grooves,cut on the face of the same, several hundred feet of German silver Mire,having a very high resistance. Near the end of the cylinder on the left, very high resistance carbonblocks are introduced into the circuit, making the total resistance about33,000 ohms. This rheostat is regulated by the sliding contact whichtravels along the two rods above and parallel with
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Keywords: ., bookauthorrockwell, bookcentury1900, bookdecade1900, bookyear1903
