An international system of electro-therapeutics : for students, general practitioners, and specialists . , thewires passing up at the backof the cabinet, which maybe opened and expose theconnections to view. Thedouble cell-selectors allowthe operator to select anycell or cells within the cir-cles, and to use them uni-formly. They are provided withbroad-flange bottoms, and,when selecting additional cells, these slide from one button to another, always resting on onebefore leaving the other, so that a gradual increase of the current isinsured without the possibility of a shock. The rheostat has
An international system of electro-therapeutics : for students, general practitioners, and specialists . , thewires passing up at the backof the cabinet, which maybe opened and expose theconnections to view. Thedouble cell-selectors allowthe operator to select anycell or cells within the cir-cles, and to use them uni-formly. They are provided withbroad-flange bottoms, and,when selecting additional cells, these slide from one button to another, always resting on onebefore leaving the other, so that a gradual increase of the current isinsured without the possibility of a shock. The rheostat has German-silver-wire coils of from 5 to 5000 ohms resistance, a total resistance of17,000 ohms, and maybe used, in connection with the meter, to measurethe resistance of the patient or to test tlie condition of the cells. Themeter is a vertical form, which is unaflfected by magnetic influences and,therefore, does not have to be adjusted. It has a scale of double values,and measures from 1 to 500 milliamperes. This is placed on a bracketin the top of the cabinet, and is easily read from a distance. The. Fig. 79. A-286 BLETER. automatic rheotome gives graduated interruptions of the galvanic is constructed on tlie principle of a clock, and is operated by a strongspring that is not liable to get out of order. The water rheostat may be used to gradually modify the currentfrom any series of cells. The faradic apparatus is of superior construc-tion, and dltfers materially from those in common use. This consists oftwo parallel primary coils, to one of which a slow vibrator is adjusted,and to the other an improved form of rapid vibrator or rheotome, whichis a thin metal ribbon, fastened permanently at one end and at the otherattached to a screw-lever, by means of which the tension of the ribbonmay be varied and the maximum number of vibrations attained, pro-ducing the most sedative effect. The Goelet system of interchangeable secondary spools are furnished, thesebeing wound wit
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectuterus, bookyear1894
