. Medical electricity; a practical treatise on the applications of electricity to medicine and surgery. ion, and so transient are the interruptions that thecurrent is practically continuous. It is in a high degreeprobable that the improvements in this direction will beutilized in the instruments for the medical applications ofelectricity in the future (Fig. 45). CHAPTER VII. ELECTRO-MAGNETIC AND MAGNETO-ELECTRIC BATTERIES FOR MEDICAL USE. Having set forth the principles on which the construc-tion of faradic instruments rests, it is necessary now toenter into some details in regard to their for
. Medical electricity; a practical treatise on the applications of electricity to medicine and surgery. ion, and so transient are the interruptions that thecurrent is practically continuous. It is in a high degreeprobable that the improvements in this direction will beutilized in the instruments for the medical applications ofelectricity in the future (Fig. 45). CHAPTER VII. ELECTRO-MAGNETIC AND MAGNETO-ELECTRIC BATTERIES FOR MEDICAL USE. Having set forth the principles on which the construc-tion of faradic instruments rests, it is necessary now toenter into some details in regard to their form and themode of managing them. It would be invidious to decideas to the relative merit of the manufacturers of these in-struments. There are now to be obtained excellent instru- BATTERIES FOR MEDICAL USE. 79 ments from the chief dealers, but the arrangement of thehammer by which very slow or rapid interruptions can beeffected is very important, and this point should be lookedto in the selection of an instrument (Fig. 43). Besides thegradation in the interruptions, batteries should possess Fig. Kidders faradic batter)-, with tip cup. means for regulating the force of the current from a faintscarcely perceptible tingling to the most intense burningpain. The elements should be portable and not spill whencarried about, and there should be an arrangement for lift-ing the zinc out of the fluid when not in use (Fig. 37). 80 ELECTRO-PHYSICS. The Grenet cup fulfils these conditions, and this, or somemodification of it, is now chiefly used. Kidder has inventeda tip cup, which is so arranged that when the battery isnot in action the cup is turned over and the fluid flows intoa diverticulum (Fig. 47). Every faradic battery shouldhave a movable cylinder for modifying the strength of thecurrent, and should furnish the extra and secondary cur-rent. The primary current, so called, is reinforced byinduction between the turns of the coil and the core of softiron, and is chiefly the extra c
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectro, bookyear1887
