. Medical electricity; a practical treatise on the applications of electricity to medicine and surgery. E O 7— J-. +-< H -2 •« | d « c H aJ ^ S 6 o . tn lt, ^- o i» r-a £ °js c > G ?-- o ° S s o a. 0 New York, plays in a fork which enables the operator toregulate the interruptions to any extent (Fig. 39). In thefaradic instrument of Flemming, of Philadelphia, the same ELECTRO-MAGNETISM. end is attained by a mechanical arrangement for regulatingthe rapidity of the interruptions. In an instrument pro-vided with this arrangement, distinct contractions andrelaxations of the muscles operat
. Medical electricity; a practical treatise on the applications of electricity to medicine and surgery. E O 7— J-. +-< H -2 •« | d « c H aJ ^ S 6 o . tn lt, ^- o i» r-a £ °js c > G ?-- o ° S s o a. 0 New York, plays in a fork which enables the operator toregulate the interruptions to any extent (Fig. 39). In thefaradic instrument of Flemming, of Philadelphia, the same ELECTRO-MAGNETISM. end is attained by a mechanical arrangement for regulatingthe rapidity of the interruptions. In an instrument pro-vided with this arrangement, distinct contractions andrelaxations of the muscles operated on can be obtained,whilst by the other hammer the interruptions are so rapidas to keep the muscles in a state of tonic contraction. A temporary magnet is also used for securing interrup-tions of the hammer, instead of the screw and core of theprimary coil. The mechanism of the construction of a faradic batterywill be more readily comprehended by reference to theseinstructive diagrams from De Watteville. In Fig. 40 we. (~^ have the parts reduced to their simplest expression. Theprimary coil, an extension of the conjunctive wire, is repre-sented by the line drawn from A to B. The galvanicelement is E, and at K is the interrupter. Whenever thecurrent is made or broken at K, an induced current startsin the coil represented by the line from C to D, and theneedle of the galvanometer G is deflected in one directionat the making, and in the opposite direction at the break-ing, of the circuit. In the next diagram, another point, viz., the inductionbetween the turns of the coil, is expressed. In Figs. 41 and 72 ELECTRO-PHYSICS. 42, we find that a current passing through A B induces acurrent in C D. Precisely the same effect is exerted be-
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectro, bookyear1887
